From: Martin Kronbichler <kronbichler@lnm.mw.tum.de>
Date: Sun, 5 Nov 2017 17:58:32 +0000 (+0100)
Subject: Filter away small numbers to avoid roundoff errors for floats.
X-Git-Tag: v9.0.0-rc1~817^2~2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2abe4a8cd463d199cf489514a33e0e047ece7a1a;p=dealii.git

Filter away small numbers to avoid roundoff errors for floats.
---

diff --git a/tests/multigrid/transfer_matrix_free_04.cc b/tests/multigrid/transfer_matrix_free_04.cc
index ee22291078..b1e92fa7ea 100644
--- a/tests/multigrid/transfer_matrix_free_04.cc
+++ b/tests/multigrid/transfer_matrix_free_04.cc
@@ -68,6 +68,8 @@ void check(const unsigned int fe_degree)
       MGTransferMatrixFree<dim, Number> transfer;
       transfer.build(mgdof);
 
+      const double tolerance = 1000. * std::numeric_limits<Number>::epsilon();
+
       // check prolongation for all levels using random vector
       for (unsigned int level=1; level<mgdof.get_triangulation().n_global_levels(); ++level)
         {
@@ -83,7 +85,8 @@ void check(const unsigned int fe_degree)
           transfer_ref.prolongate(level, v3, v1_cpy);
           v2_cpy = v2;
           v3 -= v2_cpy;
-          deallog << "Diff prolongate   l" << level << ": " << v3.l2_norm() << std::endl;
+          deallog << "Diff prolongate   l" << level << ": "
+                  << filter_out_small_numbers(v3.l2_norm(), tolerance) << std::endl;
         }
 
       // check restriction for all levels using random vector
@@ -101,7 +104,8 @@ void check(const unsigned int fe_degree)
           transfer_ref.restrict_and_add(level, v3, v1_cpy);
           v2_cpy = v2;
           v3 -= v2_cpy;
-          deallog << "Diff restrict     l" << level << ": " << v3.l2_norm() << std::endl;
+          deallog << "Diff restrict     l" << level << ": "
+                  << filter_out_small_numbers(v3.l2_norm(), tolerance) << std::endl;
 
           v2 = 1.;
           v3 = 1.;
@@ -109,7 +113,8 @@ void check(const unsigned int fe_degree)
           transfer_ref.restrict_and_add(level, v3, v1_cpy);
           v2_cpy = v2;
           v3 -= v2_cpy;
-          deallog << "Diff restrict add l" << level << ": " << v3.l2_norm() << std::endl;
+          deallog << "Diff restrict add l" << level << ": "
+                  << filter_out_small_numbers(v3.l2_norm(), tolerance) << std::endl;
         }
       deallog << std::endl;
     }
diff --git a/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=1.output b/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=1.output
index ebb22c998f..f48f110324 100644
--- a/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=1.output
+++ b/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=1.output
@@ -1,364 +1,364 @@
 
 DEAL::FE: FE_DGQ<2>(1)
 DEAL::no. cells: 16
-DEAL::Diff prolongate   l1: 2.42730e-15
-DEAL::Diff prolongate   l2: 4.63485e-15
-DEAL::Diff restrict     l1: 4.44089e-16
-DEAL::Diff restrict add l1: 4.44089e-16
-DEAL::Diff restrict     l2: 2.44249e-15
-DEAL::Diff restrict add l2: 2.47258e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 2.48269e-15
-DEAL::Diff prolongate   l2: 3.86102e-15
-DEAL::Diff prolongate   l3: 8.29201e-15
-DEAL::Diff restrict     l1: 2.08296e-15
-DEAL::Diff restrict add l1: 2.08296e-15
-DEAL::Diff restrict     l2: 3.07674e-15
-DEAL::Diff restrict add l2: 3.43990e-15
-DEAL::Diff restrict     l3: 5.19319e-15
-DEAL::Diff restrict add l3: 5.54667e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 144
-DEAL::Diff prolongate   l1: 6.88897e-15
-DEAL::Diff prolongate   l2: 1.33755e-14
-DEAL::Diff restrict     l1: 3.72876e-15
-DEAL::Diff restrict add l1: 3.94715e-15
-DEAL::Diff restrict     l2: 8.26501e-15
-DEAL::Diff restrict add l2: 8.62551e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 256
-DEAL::Diff prolongate   l1: 1.99512e-15
-DEAL::Diff prolongate   l2: 4.47468e-15
-DEAL::Diff prolongate   l3: 7.97016e-15
-DEAL::Diff prolongate   l4: 1.78189e-14
-DEAL::Diff restrict     l1: 1.08779e-15
-DEAL::Diff restrict add l1: 1.08779e-15
-DEAL::Diff restrict     l2: 2.55110e-15
-DEAL::Diff restrict add l2: 2.58946e-15
-DEAL::Diff restrict     l3: 5.60085e-15
-DEAL::Diff restrict add l3: 5.77316e-15
-DEAL::Diff restrict     l4: 1.02508e-14
-DEAL::Diff restrict add l4: 1.04997e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::no. cells: 400
-DEAL::Diff prolongate   l1: 1.16046e-14
-DEAL::Diff prolongate   l2: 2.10518e-14
-DEAL::Diff restrict     l1: 6.29997e-15
-DEAL::Diff restrict add l1: 6.51541e-15
-DEAL::Diff restrict     l2: 1.27211e-14
-DEAL::Diff restrict add l2: 1.31082e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 576
-DEAL::Diff prolongate   l1: 5.46753e-15
-DEAL::Diff prolongate   l2: 1.33721e-14
-DEAL::Diff prolongate   l3: 2.43537e-14
-DEAL::Diff restrict     l1: 4.00297e-15
-DEAL::Diff restrict add l1: 4.07014e-15
-DEAL::Diff restrict     l2: 7.98126e-15
-DEAL::Diff restrict add l2: 8.20063e-15
-DEAL::Diff restrict     l3: 1.60699e-14
-DEAL::Diff restrict add l3: 1.63184e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1024
-DEAL::Diff prolongate   l1: 2.20260e-15
-DEAL::Diff prolongate   l2: 4.18857e-15
-DEAL::Diff prolongate   l3: 7.47953e-15
-DEAL::Diff prolongate   l4: 1.62849e-14
-DEAL::Diff prolongate   l5: 3.36500e-14
-DEAL::Diff restrict     l1: 1.33227e-15
-DEAL::Diff restrict add l1: 1.33227e-15
-DEAL::Diff restrict     l2: 3.28596e-15
-DEAL::Diff restrict add l2: 3.50380e-15
-DEAL::Diff restrict     l3: 4.67350e-15
-DEAL::Diff restrict add l3: 4.74158e-15
-DEAL::Diff restrict     l4: 1.04868e-14
-DEAL::Diff restrict add l4: 1.10510e-14
-DEAL::Diff restrict     l5: 2.10073e-14
-DEAL::Diff restrict add l5: 2.15280e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<2>(3)
 DEAL::no. cells: 4
-DEAL::Diff prolongate   l1: 3.94291e-15
-DEAL::Diff restrict     l1: 4.09167e-15
-DEAL::Diff restrict add l1: 4.12430e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 16
-DEAL::Diff prolongate   l1: 3.45435e-15
-DEAL::Diff prolongate   l2: 8.14943e-15
-DEAL::Diff restrict     l1: 6.20938e-15
-DEAL::Diff restrict add l1: 6.23408e-15
-DEAL::Diff restrict     l2: 8.93562e-15
-DEAL::Diff restrict add l2: 8.85329e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 36
-DEAL::Diff prolongate   l1: 1.10008e-14
-DEAL::Diff restrict     l1: 1.51335e-14
-DEAL::Diff restrict add l1: 1.52019e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 3.65482e-15
-DEAL::Diff prolongate   l2: 7.49707e-15
-DEAL::Diff prolongate   l3: 1.54033e-14
-DEAL::Diff restrict     l1: 5.57177e-15
-DEAL::Diff restrict add l1: 6.00342e-15
-DEAL::Diff restrict     l2: 9.95333e-15
-DEAL::Diff restrict add l2: 9.72254e-15
-DEAL::Diff restrict     l3: 1.91394e-14
-DEAL::Diff restrict add l3: 1.94381e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 100
-DEAL::Diff prolongate   l1: 1.90663e-14
-DEAL::Diff restrict     l1: 2.44576e-14
-DEAL::Diff restrict add l1: 2.45415e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 144
-DEAL::Diff prolongate   l1: 1.20458e-14
-DEAL::Diff prolongate   l2: 2.46803e-14
-DEAL::Diff restrict     l1: 1.27889e-14
-DEAL::Diff restrict add l1: 1.29616e-14
-DEAL::Diff restrict     l2: 2.75935e-14
-DEAL::Diff restrict add l2: 2.79972e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 256
-DEAL::Diff prolongate   l1: 3.68306e-15
-DEAL::Diff prolongate   l2: 6.61697e-15
-DEAL::Diff prolongate   l3: 1.50224e-14
-DEAL::Diff prolongate   l4: 3.07040e-14
-DEAL::Diff restrict     l1: 4.27799e-15
-DEAL::Diff restrict add l1: 4.30131e-15
-DEAL::Diff restrict     l2: 9.66086e-15
-DEAL::Diff restrict add l2: 9.65639e-15
-DEAL::Diff restrict     l3: 1.93553e-14
-DEAL::Diff restrict add l3: 1.95223e-14
-DEAL::Diff restrict     l4: 3.93316e-14
-DEAL::Diff restrict add l4: 3.97261e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(1)
 DEAL::no. cells: 8
-DEAL::Diff prolongate   l1: 5.62319e-15
-DEAL::Diff restrict     l1: 7.13313e-15
-DEAL::Diff restrict add l1: 7.27005e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 7.61292e-15
-DEAL::Diff prolongate   l2: 1.53588e-14
-DEAL::Diff restrict     l1: 7.49709e-15
-DEAL::Diff restrict add l1: 7.43103e-15
-DEAL::Diff restrict     l2: 2.03507e-14
-DEAL::Diff restrict add l2: 2.04522e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 216
-DEAL::Diff prolongate   l1: 3.12292e-14
-DEAL::Diff restrict     l1: 3.58311e-14
-DEAL::Diff restrict add l1: 3.57733e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 512
-DEAL::Diff prolongate   l1: 6.42420e-15
-DEAL::Diff prolongate   l2: 1.52647e-14
-DEAL::Diff prolongate   l3: 4.86263e-14
-DEAL::Diff restrict     l1: 7.90678e-15
-DEAL::Diff restrict add l1: 7.84418e-15
-DEAL::Diff restrict     l2: 1.95954e-14
-DEAL::Diff restrict add l2: 1.97457e-14
-DEAL::Diff restrict     l3: 5.69578e-14
-DEAL::Diff restrict add l3: 5.70944e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1000
-DEAL::Diff prolongate   l1: 7.05108e-14
-DEAL::Diff restrict     l1: 7.88568e-14
-DEAL::Diff restrict add l1: 7.92684e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 1728
-DEAL::Diff prolongate   l1: 3.42700e-14
-DEAL::Diff prolongate   l2: 9.32292e-14
-DEAL::Diff restrict     l1: 3.53211e-14
-DEAL::Diff restrict add l1: 3.58642e-14
-DEAL::Diff restrict     l2: 1.07269e-13
-DEAL::Diff restrict add l2: 1.07777e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 4096
-DEAL::Diff prolongate   l1: 6.94472e-15
-DEAL::Diff prolongate   l2: 1.73916e-14
-DEAL::Diff prolongate   l3: 4.94477e-14
-DEAL::Diff prolongate   l4: 1.42175e-13
-DEAL::Diff restrict     l1: 9.99941e-15
-DEAL::Diff restrict add l1: 1.01268e-14
-DEAL::Diff restrict     l2: 1.98702e-14
-DEAL::Diff restrict add l2: 2.00775e-14
-DEAL::Diff restrict     l3: 5.92938e-14
-DEAL::Diff restrict add l3: 5.93902e-14
-DEAL::Diff restrict     l4: 1.64893e-13
-DEAL::Diff restrict add l4: 1.65550e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(3)
 DEAL::no. cells: 1
 DEAL::
 DEAL::no. cells: 8
-DEAL::Diff prolongate   l1: 2.61666e-14
-DEAL::Diff restrict     l1: 2.93048e-14
-DEAL::Diff restrict add l1: 2.92198e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 27
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 1.85551e-14
-DEAL::Diff prolongate   l2: 6.58176e-14
-DEAL::Diff restrict     l1: 3.00713e-14
-DEAL::Diff restrict add l1: 3.02350e-14
-DEAL::Diff restrict     l2: 8.90396e-14
-DEAL::Diff restrict add l2: 8.95762e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 125
 DEAL::
 DEAL::no. cells: 216
-DEAL::Diff prolongate   l1: 1.23811e-13
-DEAL::Diff restrict     l1: 1.62149e-13
-DEAL::Diff restrict add l1: 1.62339e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 512
-DEAL::Diff prolongate   l1: 2.24122e-14
-DEAL::Diff prolongate   l2: 6.64492e-14
-DEAL::Diff prolongate   l3: 1.84152e-13
-DEAL::Diff restrict     l1: 3.30026e-14
-DEAL::Diff restrict add l1: 3.29136e-14
-DEAL::Diff restrict     l2: 8.26321e-14
-DEAL::Diff restrict add l2: 8.28989e-14
-DEAL::Diff restrict     l3: 2.49095e-13
-DEAL::Diff restrict add l3: 2.49335e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 2.49702e-13
+DEAL::Diff restrict add l3: 2.50034e-13
 DEAL::
 DEAL::FE: FE_DGQ<2>(2)
 DEAL::no. cells: 16
-DEAL::Diff prolongate   l1: 1.22811e-07
-DEAL::Diff prolongate   l2: 2.43142e-07
-DEAL::Diff restrict     l1: 1.64979e-07
-DEAL::Diff restrict add l1: 1.75139e-07
-DEAL::Diff restrict     l2: 9.39298e-07
-DEAL::Diff restrict add l2: 9.00042e-07
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 9.83725e-08
-DEAL::Diff prolongate   l2: 1.65675e-07
-DEAL::Diff prolongate   l3: 4.24979e-07
-DEAL::Diff restrict     l1: 2.77999e-07
-DEAL::Diff restrict add l1: 2.82726e-07
-DEAL::Diff restrict     l2: 7.40760e-07
-DEAL::Diff restrict add l2: 6.33560e-07
-DEAL::Diff restrict     l3: 1.17260e-06
-DEAL::Diff restrict add l3: 1.37206e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 144
-DEAL::Diff prolongate   l1: 3.36616e-07
-DEAL::Diff prolongate   l2: 7.18100e-07
-DEAL::Diff restrict     l1: 8.64169e-07
-DEAL::Diff restrict add l1: 1.09530e-06
-DEAL::Diff restrict     l2: 2.10080e-06
-DEAL::Diff restrict add l2: 2.36927e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 256
-DEAL::Diff prolongate   l1: 1.74511e-07
-DEAL::Diff prolongate   l2: 2.12567e-07
-DEAL::Diff prolongate   l3: 4.31921e-07
-DEAL::Diff prolongate   l4: 9.14852e-07
-DEAL::Diff restrict     l1: 4.27944e-07
-DEAL::Diff restrict add l1: 8.32970e-07
-DEAL::Diff restrict     l2: 6.29201e-07
-DEAL::Diff restrict add l2: 7.19613e-07
-DEAL::Diff restrict     l3: 1.47747e-06
-DEAL::Diff restrict add l3: 1.69019e-06
-DEAL::Diff restrict     l4: 2.69436e-06
-DEAL::Diff restrict add l4: 3.13553e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::no. cells: 400
-DEAL::Diff prolongate   l1: 6.64207e-07
-DEAL::Diff prolongate   l2: 1.18769e-06
-DEAL::Diff restrict     l1: 1.81025e-06
-DEAL::Diff restrict add l1: 2.17297e-06
-DEAL::Diff restrict     l2: 3.60278e-06
-DEAL::Diff restrict add l2: 4.02149e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 576
-DEAL::Diff prolongate   l1: 3.58019e-07
-DEAL::Diff prolongate   l2: 6.76704e-07
-DEAL::Diff prolongate   l3: 1.35897e-06
-DEAL::Diff restrict     l1: 1.72490e-06
-DEAL::Diff restrict add l1: 1.83931e-06
-DEAL::Diff restrict     l2: 2.12609e-06
-DEAL::Diff restrict add l2: 2.50979e-06
-DEAL::Diff restrict     l3: 4.29657e-06
-DEAL::Diff restrict add l3: 4.91282e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1024
-DEAL::Diff prolongate   l1: 8.28344e-08
-DEAL::Diff prolongate   l2: 2.02468e-07
-DEAL::Diff prolongate   l3: 5.00733e-07
-DEAL::Diff prolongate   l4: 8.85247e-07
-DEAL::Diff prolongate   l5: 1.79446e-06
-DEAL::Diff restrict     l1: 1.25420e-07
-DEAL::Diff restrict add l1: 1.98875e-07
-DEAL::Diff restrict     l2: 5.38769e-07
-DEAL::Diff restrict add l2: 5.71499e-07
-DEAL::Diff restrict     l3: 1.42082e-06
-DEAL::Diff restrict add l3: 1.62970e-06
-DEAL::Diff restrict     l4: 2.81189e-06
-DEAL::Diff restrict add l4: 3.20007e-06
-DEAL::Diff restrict     l5: 5.58240e-06
-DEAL::Diff restrict add l5: 6.36554e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(2)
 DEAL::no. cells: 8
-DEAL::Diff prolongate   l1: 2.47133e-07
-DEAL::Diff restrict     l1: 1.54845e-06
-DEAL::Diff restrict add l1: 1.70762e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 3.60298e-07
-DEAL::Diff prolongate   l2: 9.41445e-07
-DEAL::Diff restrict     l1: 1.37619e-06
-DEAL::Diff restrict add l1: 1.34491e-06
-DEAL::Diff restrict     l2: 3.75744e-06
-DEAL::Diff restrict add l2: 4.32141e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 216
-DEAL::Diff prolongate   l1: 1.72577e-06
-DEAL::Diff restrict     l1: 7.26111e-06
-DEAL::Diff restrict add l1: 7.91776e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 512
-DEAL::Diff prolongate   l1: 3.90603e-07
-DEAL::Diff prolongate   l2: 1.04546e-06
-DEAL::Diff prolongate   l3: 2.53332e-06
-DEAL::Diff restrict     l1: 1.38498e-06
-DEAL::Diff restrict add l1: 1.50855e-06
-DEAL::Diff restrict     l2: 4.42587e-06
-DEAL::Diff restrict add l2: 4.81502e-06
-DEAL::Diff restrict     l3: 1.10298e-05
-DEAL::Diff restrict add l3: 1.19634e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1000
-DEAL::Diff prolongate   l1: 3.69482e-06
-DEAL::Diff restrict     l1: 1.54261e-05
-DEAL::Diff restrict add l1: 1.66027e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 1728
-DEAL::Diff prolongate   l1: 1.63508e-06
-DEAL::Diff prolongate   l2: 4.89147e-06
-DEAL::Diff restrict     l1: 7.64553e-06
-DEAL::Diff restrict add l1: 8.33680e-06
-DEAL::Diff restrict     l2: 2.19922e-05
-DEAL::Diff restrict add l2: 2.33544e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 4096
-DEAL::Diff prolongate   l1: 3.18157e-07
-DEAL::Diff prolongate   l2: 8.89243e-07
-DEAL::Diff prolongate   l3: 2.74277e-06
-DEAL::Diff prolongate   l4: 7.59119e-06
-DEAL::Diff restrict     l1: 1.19615e-06
-DEAL::Diff restrict add l1: 1.34576e-06
-DEAL::Diff restrict     l2: 3.77934e-06
-DEAL::Diff restrict add l2: 4.14406e-06
-DEAL::Diff restrict     l3: 1.05205e-05
-DEAL::Diff restrict add l3: 1.14207e-05
-DEAL::Diff restrict     l4: 3.29310e-05
-DEAL::Diff restrict add l4: 3.53235e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
diff --git a/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=4.output b/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=4.output
index c738f96744..f48f110324 100644
--- a/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=4.output
+++ b/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=4.output
@@ -1,364 +1,364 @@
 
 DEAL::FE: FE_DGQ<2>(1)
 DEAL::no. cells: 16
-DEAL::Diff prolongate   l1: 2.42730e-15
-DEAL::Diff prolongate   l2: 4.75520e-15
-DEAL::Diff restrict     l1: 1.83103e-15
-DEAL::Diff restrict add l1: 1.83103e-15
-DEAL::Diff restrict     l2: 2.91209e-15
-DEAL::Diff restrict add l2: 2.80867e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 2.57170e-15
-DEAL::Diff prolongate   l2: 2.45048e-15
-DEAL::Diff prolongate   l3: 9.89572e-15
-DEAL::Diff restrict     l1: 4.44089e-16
-DEAL::Diff restrict add l1: 4.44089e-16
-DEAL::Diff restrict     l2: 1.83103e-15
-DEAL::Diff restrict add l2: 1.83103e-15
-DEAL::Diff restrict     l3: 3.98445e-15
-DEAL::Diff restrict add l3: 4.21300e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 144
-DEAL::Diff prolongate   l1: 5.33674e-15
-DEAL::Diff prolongate   l2: 1.24153e-14
-DEAL::Diff restrict     l1: 4.64705e-15
-DEAL::Diff restrict add l1: 4.86475e-15
-DEAL::Diff restrict     l2: 8.96741e-15
-DEAL::Diff restrict add l2: 9.49354e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 256
-DEAL::Diff prolongate   l1: 1.83942e-15
-DEAL::Diff prolongate   l2: 4.64813e-15
-DEAL::Diff prolongate   l3: 8.51365e-15
-DEAL::Diff prolongate   l4: 1.54965e-14
-DEAL::Diff restrict     l1: 1.48952e-15
-DEAL::Diff restrict add l1: 1.60119e-15
-DEAL::Diff restrict     l2: 1.92296e-15
-DEAL::Diff restrict add l2: 1.88411e-15
-DEAL::Diff restrict     l3: 4.72073e-15
-DEAL::Diff restrict add l3: 5.15985e-15
-DEAL::Diff restrict     l4: 1.11067e-14
-DEAL::Diff restrict add l4: 1.10666e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::no. cells: 400
-DEAL::Diff prolongate   l1: 1.06923e-14
-DEAL::Diff prolongate   l2: 2.06490e-14
-DEAL::Diff restrict     l1: 6.84027e-15
-DEAL::Diff restrict add l1: 7.27005e-15
-DEAL::Diff restrict     l2: 1.50475e-14
-DEAL::Diff restrict add l2: 1.55954e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 576
-DEAL::Diff prolongate   l1: 5.85758e-15
-DEAL::Diff prolongate   l2: 1.32063e-14
-DEAL::Diff prolongate   l3: 2.48305e-14
-DEAL::Diff restrict     l1: 3.32326e-15
-DEAL::Diff restrict add l1: 3.36747e-15
-DEAL::Diff restrict     l2: 7.72702e-15
-DEAL::Diff restrict add l2: 8.22465e-15
-DEAL::Diff restrict     l3: 1.47760e-14
-DEAL::Diff restrict add l3: 1.51626e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1024
-DEAL::Diff prolongate   l1: 8.21666e-16
-DEAL::Diff prolongate   l2: 2.76290e-15
-DEAL::Diff prolongate   l3: 9.07072e-15
-DEAL::Diff prolongate   l4: 1.63032e-14
-DEAL::Diff prolongate   l5: 3.47830e-14
-DEAL::Diff restrict     l1: 2.55110e-15
-DEAL::Diff restrict add l1: 2.55110e-15
-DEAL::Diff restrict     l2: 2.71040e-15
-DEAL::Diff restrict add l2: 2.80867e-15
-DEAL::Diff restrict     l3: 5.30589e-15
-DEAL::Diff restrict add l3: 5.63486e-15
-DEAL::Diff restrict     l4: 1.06251e-14
-DEAL::Diff restrict add l4: 1.08416e-14
-DEAL::Diff restrict     l5: 2.11803e-14
-DEAL::Diff restrict add l5: 2.18486e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<2>(3)
 DEAL::no. cells: 4
-DEAL::Diff prolongate   l1: 3.56374e-15
-DEAL::Diff restrict     l1: 3.90526e-15
-DEAL::Diff restrict add l1: 3.77476e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 16
-DEAL::Diff prolongate   l1: 4.35868e-15
-DEAL::Diff prolongate   l2: 6.66819e-15
-DEAL::Diff restrict     l1: 5.32690e-15
-DEAL::Diff restrict add l1: 5.46270e-15
-DEAL::Diff restrict     l2: 9.04406e-15
-DEAL::Diff restrict add l2: 8.63694e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 36
-DEAL::Diff prolongate   l1: 1.23183e-14
-DEAL::Diff restrict     l1: 1.40807e-14
-DEAL::Diff restrict add l1: 1.40038e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 3.55255e-15
-DEAL::Diff prolongate   l2: 7.72413e-15
-DEAL::Diff prolongate   l3: 1.52330e-14
-DEAL::Diff restrict     l1: 2.72401e-15
-DEAL::Diff restrict add l1: 2.73755e-15
-DEAL::Diff restrict     l2: 1.06282e-14
-DEAL::Diff restrict add l2: 1.04314e-14
-DEAL::Diff restrict     l3: 1.94398e-14
-DEAL::Diff restrict add l3: 1.95260e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 100
-DEAL::Diff prolongate   l1: 1.81678e-14
-DEAL::Diff restrict     l1: 2.32191e-14
-DEAL::Diff restrict add l1: 2.35587e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 144
-DEAL::Diff prolongate   l1: 1.25152e-14
-DEAL::Diff prolongate   l2: 2.42694e-14
-DEAL::Diff restrict     l1: 1.40505e-14
-DEAL::Diff restrict add l1: 1.41974e-14
-DEAL::Diff restrict     l2: 2.99210e-14
-DEAL::Diff restrict add l2: 2.98206e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 256
-DEAL::Diff prolongate   l1: 2.87418e-15
-DEAL::Diff prolongate   l2: 7.67669e-15
-DEAL::Diff prolongate   l3: 1.59343e-14
-DEAL::Diff prolongate   l4: 3.01092e-14
-DEAL::Diff restrict     l1: 3.85553e-15
-DEAL::Diff restrict add l1: 3.87148e-15
-DEAL::Diff restrict     l2: 9.63529e-15
-DEAL::Diff restrict add l2: 9.57628e-15
-DEAL::Diff restrict     l3: 1.93916e-14
-DEAL::Diff restrict add l3: 2.01291e-14
-DEAL::Diff restrict     l4: 3.96720e-14
-DEAL::Diff restrict add l4: 4.00049e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(1)
 DEAL::no. cells: 8
-DEAL::Diff prolongate   l1: 7.66785e-15
-DEAL::Diff restrict     l1: 6.35839e-15
-DEAL::Diff restrict add l1: 6.40475e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 5.84075e-15
-DEAL::Diff prolongate   l2: 2.01201e-14
-DEAL::Diff restrict     l1: 9.06856e-15
-DEAL::Diff restrict add l1: 9.05768e-15
-DEAL::Diff restrict     l2: 2.13994e-14
-DEAL::Diff restrict add l2: 2.16103e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 216
-DEAL::Diff prolongate   l1: 3.23385e-14
-DEAL::Diff restrict     l1: 3.64207e-14
-DEAL::Diff restrict add l1: 3.68835e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 512
-DEAL::Diff prolongate   l1: 4.35406e-15
-DEAL::Diff prolongate   l2: 1.77764e-14
-DEAL::Diff prolongate   l3: 4.76819e-14
-DEAL::Diff restrict     l1: 6.61678e-15
-DEAL::Diff restrict add l1: 6.64652e-15
-DEAL::Diff restrict     l2: 2.03071e-14
-DEAL::Diff restrict add l2: 2.04715e-14
-DEAL::Diff restrict     l3: 5.44494e-14
-DEAL::Diff restrict add l3: 5.47510e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1000
-DEAL::Diff prolongate   l1: 6.72978e-14
-DEAL::Diff restrict     l1: 7.73659e-14
-DEAL::Diff restrict add l1: 7.75645e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 1728
-DEAL::Diff prolongate   l1: 3.06475e-14
-DEAL::Diff prolongate   l2: 8.95228e-14
-DEAL::Diff restrict     l1: 3.67147e-14
-DEAL::Diff restrict add l1: 3.70142e-14
-DEAL::Diff restrict     l2: 1.05868e-13
-DEAL::Diff restrict add l2: 1.06371e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 4096
-DEAL::Diff prolongate   l1: 4.42194e-15
-DEAL::Diff prolongate   l2: 1.62533e-14
-DEAL::Diff prolongate   l3: 4.98270e-14
-DEAL::Diff prolongate   l4: 1.39905e-13
-DEAL::Diff restrict     l1: 8.57679e-15
-DEAL::Diff restrict add l1: 8.79252e-15
-DEAL::Diff restrict     l2: 1.87151e-14
-DEAL::Diff restrict add l2: 1.87572e-14
-DEAL::Diff restrict     l3: 5.81587e-14
-DEAL::Diff restrict add l3: 5.90639e-14
-DEAL::Diff restrict     l4: 1.64130e-13
-DEAL::Diff restrict add l4: 1.65273e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(3)
 DEAL::no. cells: 1
 DEAL::
 DEAL::no. cells: 8
-DEAL::Diff prolongate   l1: 2.59099e-14
-DEAL::Diff restrict     l1: 3.16724e-14
-DEAL::Diff restrict add l1: 3.16801e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 27
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 2.49992e-14
-DEAL::Diff prolongate   l2: 6.76776e-14
-DEAL::Diff restrict     l1: 2.58387e-14
-DEAL::Diff restrict add l1: 2.58622e-14
-DEAL::Diff restrict     l2: 8.93972e-14
-DEAL::Diff restrict add l2: 8.87461e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 125
 DEAL::
 DEAL::no. cells: 216
-DEAL::Diff prolongate   l1: 1.28964e-13
-DEAL::Diff restrict     l1: 1.55323e-13
-DEAL::Diff restrict add l1: 1.56140e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 512
-DEAL::Diff prolongate   l1: 2.40426e-14
-DEAL::Diff prolongate   l2: 6.43156e-14
-DEAL::Diff prolongate   l3: 1.91084e-13
-DEAL::Diff restrict     l1: 2.27174e-14
-DEAL::Diff restrict add l1: 2.26844e-14
-DEAL::Diff restrict     l2: 8.70838e-14
-DEAL::Diff restrict add l2: 8.71246e-14
-DEAL::Diff restrict     l3: 2.38563e-13
-DEAL::Diff restrict add l3: 2.39207e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 2.49702e-13
+DEAL::Diff restrict add l3: 2.50034e-13
 DEAL::
 DEAL::FE: FE_DGQ<2>(2)
 DEAL::no. cells: 16
-DEAL::Diff prolongate   l1: 1.93985e-07
-DEAL::Diff prolongate   l2: 2.31635e-07
-DEAL::Diff restrict     l1: 2.37631e-07
-DEAL::Diff restrict add l1: 3.25040e-07
-DEAL::Diff restrict     l2: 6.91412e-07
-DEAL::Diff restrict add l2: 6.41936e-07
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 1.30648e-07
-DEAL::Diff prolongate   l2: 1.96223e-07
-DEAL::Diff prolongate   l3: 4.59958e-07
-DEAL::Diff restrict     l1: 3.36495e-07
-DEAL::Diff restrict add l1: 3.30167e-07
-DEAL::Diff restrict     l2: 8.25047e-07
-DEAL::Diff restrict add l2: 9.45896e-07
-DEAL::Diff restrict     l3: 1.65915e-06
-DEAL::Diff restrict add l3: 1.86334e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 144
-DEAL::Diff prolongate   l1: 3.73109e-07
-DEAL::Diff prolongate   l2: 6.59641e-07
-DEAL::Diff restrict     l1: 9.56541e-07
-DEAL::Diff restrict add l1: 1.05777e-06
-DEAL::Diff restrict     l2: 2.03978e-06
-DEAL::Diff restrict add l2: 2.37776e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 256
-DEAL::Diff prolongate   l1: 1.01907e-07
-DEAL::Diff prolongate   l2: 2.68770e-07
-DEAL::Diff prolongate   l3: 4.77139e-07
-DEAL::Diff prolongate   l4: 8.94320e-07
-DEAL::Diff restrict     l1: 5.16581e-07
-DEAL::Diff restrict add l1: 5.44122e-07
-DEAL::Diff restrict     l2: 8.74800e-07
-DEAL::Diff restrict add l2: 1.13932e-06
-DEAL::Diff restrict     l3: 1.33845e-06
-DEAL::Diff restrict add l3: 1.43447e-06
-DEAL::Diff restrict     l4: 2.78068e-06
-DEAL::Diff restrict add l4: 3.10409e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::no. cells: 400
-DEAL::Diff prolongate   l1: 5.66863e-07
-DEAL::Diff prolongate   l2: 1.14843e-06
-DEAL::Diff restrict     l1: 1.80777e-06
-DEAL::Diff restrict add l1: 2.04608e-06
-DEAL::Diff restrict     l2: 3.18820e-06
-DEAL::Diff restrict add l2: 3.52960e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 576
-DEAL::Diff prolongate   l1: 2.99429e-07
-DEAL::Diff prolongate   l2: 6.75292e-07
-DEAL::Diff prolongate   l3: 1.28940e-06
-DEAL::Diff restrict     l1: 1.13248e-06
-DEAL::Diff restrict add l1: 1.46675e-06
-DEAL::Diff restrict     l2: 2.04213e-06
-DEAL::Diff restrict add l2: 2.29727e-06
-DEAL::Diff restrict     l3: 4.33146e-06
-DEAL::Diff restrict add l3: 4.89879e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1024
-DEAL::Diff prolongate   l1: 9.16300e-08
-DEAL::Diff prolongate   l2: 2.73477e-07
-DEAL::Diff prolongate   l3: 4.75587e-07
-DEAL::Diff prolongate   l4: 8.94963e-07
-DEAL::Diff prolongate   l5: 1.87661e-06
-DEAL::Diff restrict     l1: 5.41236e-07
-DEAL::Diff restrict add l1: 5.43245e-07
-DEAL::Diff restrict     l2: 5.95926e-07
-DEAL::Diff restrict add l2: 6.49914e-07
-DEAL::Diff restrict     l3: 1.17882e-06
-DEAL::Diff restrict add l3: 1.45867e-06
-DEAL::Diff restrict     l4: 2.92416e-06
-DEAL::Diff restrict add l4: 3.24912e-06
-DEAL::Diff restrict     l5: 5.89493e-06
-DEAL::Diff restrict add l5: 6.80406e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(2)
 DEAL::no. cells: 8
-DEAL::Diff prolongate   l1: 2.29384e-07
-DEAL::Diff restrict     l1: 8.02609e-07
-DEAL::Diff restrict add l1: 1.08917e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 2.43458e-07
-DEAL::Diff prolongate   l2: 8.94969e-07
-DEAL::Diff restrict     l1: 1.24806e-06
-DEAL::Diff restrict add l1: 1.46199e-06
-DEAL::Diff restrict     l2: 4.18845e-06
-DEAL::Diff restrict add l2: 4.45502e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 216
-DEAL::Diff prolongate   l1: 1.76435e-06
-DEAL::Diff restrict     l1: 7.50930e-06
-DEAL::Diff restrict add l1: 7.84684e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 512
-DEAL::Diff prolongate   l1: 3.24688e-07
-DEAL::Diff prolongate   l2: 9.06391e-07
-DEAL::Diff prolongate   l3: 2.67587e-06
-DEAL::Diff restrict     l1: 1.90910e-06
-DEAL::Diff restrict add l1: 1.91738e-06
-DEAL::Diff restrict     l2: 4.94745e-06
-DEAL::Diff restrict add l2: 5.18050e-06
-DEAL::Diff restrict     l3: 1.13834e-05
-DEAL::Diff restrict add l3: 1.22330e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1000
-DEAL::Diff prolongate   l1: 3.76262e-06
-DEAL::Diff restrict     l1: 1.58592e-05
-DEAL::Diff restrict add l1: 1.68245e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 1728
-DEAL::Diff prolongate   l1: 1.81854e-06
-DEAL::Diff prolongate   l2: 4.87581e-06
-DEAL::Diff restrict     l1: 7.40387e-06
-DEAL::Diff restrict add l1: 7.93943e-06
-DEAL::Diff restrict     l2: 2.11026e-05
-DEAL::Diff restrict add l2: 2.23522e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 4096
-DEAL::Diff prolongate   l1: 3.26872e-07
-DEAL::Diff prolongate   l2: 1.04283e-06
-DEAL::Diff prolongate   l3: 2.70062e-06
-DEAL::Diff prolongate   l4: 7.59659e-06
-DEAL::Diff restrict     l1: 1.24268e-06
-DEAL::Diff restrict add l1: 1.36601e-06
-DEAL::Diff restrict     l2: 4.26569e-06
-DEAL::Diff restrict add l2: 4.52410e-06
-DEAL::Diff restrict     l3: 1.14729e-05
-DEAL::Diff restrict add l3: 1.23164e-05
-DEAL::Diff restrict     l4: 3.31074e-05
-DEAL::Diff restrict add l4: 3.54791e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
diff --git a/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=7.output b/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=7.output
index ce6a1fef62..f48f110324 100644
--- a/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=7.output
+++ b/tests/multigrid/transfer_matrix_free_04.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=7.output
@@ -1,364 +1,364 @@
 
 DEAL::FE: FE_DGQ<2>(1)
 DEAL::no. cells: 16
-DEAL::Diff prolongate   l1: 2.42730e-15
-DEAL::Diff prolongate   l2: 4.75520e-15
-DEAL::Diff restrict     l1: 1.83103e-15
-DEAL::Diff restrict add l1: 1.83103e-15
-DEAL::Diff restrict     l2: 2.91209e-15
-DEAL::Diff restrict add l2: 2.80867e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 2.57170e-15
-DEAL::Diff prolongate   l2: 4.60809e-15
-DEAL::Diff prolongate   l3: 8.85232e-15
-DEAL::Diff restrict     l1: 1.01754e-15
-DEAL::Diff restrict add l1: 9.93014e-16
-DEAL::Diff restrict     l2: 2.61787e-15
-DEAL::Diff restrict add l2: 2.58946e-15
-DEAL::Diff restrict     l3: 4.28264e-15
-DEAL::Diff restrict add l3: 4.35117e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 144
-DEAL::Diff prolongate   l1: 7.86285e-15
-DEAL::Diff prolongate   l2: 1.45597e-14
-DEAL::Diff restrict     l1: 3.32326e-15
-DEAL::Diff restrict add l1: 3.07674e-15
-DEAL::Diff restrict     l2: 8.10691e-15
-DEAL::Diff restrict add l2: 8.66828e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 256
-DEAL::Diff prolongate   l1: 1.33060e-15
-DEAL::Diff prolongate   l2: 4.54217e-15
-DEAL::Diff prolongate   l3: 1.02552e-14
-DEAL::Diff prolongate   l4: 1.61778e-14
-DEAL::Diff restrict     l1: 7.02167e-16
-DEAL::Diff restrict add l1: 7.69185e-16
-DEAL::Diff restrict     l2: 4.14814e-15
-DEAL::Diff restrict add l2: 4.23634e-15
-DEAL::Diff restrict     l3: 7.32074e-15
-DEAL::Diff restrict add l3: 7.54952e-15
-DEAL::Diff restrict     l4: 9.21953e-15
-DEAL::Diff restrict add l4: 9.83033e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::no. cells: 400
-DEAL::Diff prolongate   l1: 9.58332e-15
-DEAL::Diff prolongate   l2: 2.25266e-14
-DEAL::Diff restrict     l1: 7.63717e-15
-DEAL::Diff restrict add l1: 7.66617e-15
-DEAL::Diff restrict     l2: 1.30176e-14
-DEAL::Diff restrict add l2: 1.30478e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 576
-DEAL::Diff prolongate   l1: 5.57129e-15
-DEAL::Diff prolongate   l2: 1.16315e-14
-DEAL::Diff prolongate   l3: 2.55590e-14
-DEAL::Diff restrict     l1: 4.00912e-15
-DEAL::Diff restrict add l1: 4.11831e-15
-DEAL::Diff restrict     l2: 7.46413e-15
-DEAL::Diff restrict add l2: 7.80638e-15
-DEAL::Diff restrict     l3: 1.69766e-14
-DEAL::Diff restrict add l3: 1.73919e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1024
-DEAL::Diff prolongate   l1: 2.32684e-15
-DEAL::Diff prolongate   l2: 4.17295e-15
-DEAL::Diff prolongate   l3: 6.47198e-15
-DEAL::Diff prolongate   l4: 1.61283e-14
-DEAL::Diff prolongate   l5: 3.32530e-14
-DEAL::Diff restrict     l1: 1.60119e-15
-DEAL::Diff restrict add l1: 1.60119e-15
-DEAL::Diff restrict     l2: 2.62727e-15
-DEAL::Diff restrict add l2: 2.77334e-15
-DEAL::Diff restrict     l3: 4.91517e-15
-DEAL::Diff restrict add l3: 4.84444e-15
-DEAL::Diff restrict     l4: 1.12105e-14
-DEAL::Diff restrict add l4: 1.13068e-14
-DEAL::Diff restrict     l5: 2.03080e-14
-DEAL::Diff restrict add l5: 2.06967e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<2>(3)
 DEAL::no. cells: 4
-DEAL::Diff prolongate   l1: 3.27945e-15
-DEAL::Diff restrict     l1: 4.38362e-15
-DEAL::Diff restrict add l1: 4.56678e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 16
-DEAL::Diff prolongate   l1: 3.93630e-15
-DEAL::Diff prolongate   l2: 7.41792e-15
-DEAL::Diff restrict     l1: 3.44371e-15
-DEAL::Diff restrict add l1: 3.64180e-15
-DEAL::Diff restrict     l2: 9.68395e-15
-DEAL::Diff restrict add l2: 9.84787e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 36
-DEAL::Diff prolongate   l1: 1.15008e-14
-DEAL::Diff restrict     l1: 1.66719e-14
-DEAL::Diff restrict add l1: 1.68670e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 4.03689e-15
-DEAL::Diff prolongate   l2: 8.16366e-15
-DEAL::Diff prolongate   l3: 1.60670e-14
-DEAL::Diff restrict     l1: 4.73418e-15
-DEAL::Diff restrict add l1: 5.11667e-15
-DEAL::Diff restrict     l2: 1.04076e-14
-DEAL::Diff restrict add l2: 1.03680e-14
-DEAL::Diff restrict     l3: 1.85479e-14
-DEAL::Diff restrict add l3: 1.89234e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 100
-DEAL::Diff prolongate   l1: 1.83537e-14
-DEAL::Diff restrict     l1: 2.32443e-14
-DEAL::Diff restrict add l1: 2.36892e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 144
-DEAL::Diff prolongate   l1: 1.25803e-14
-DEAL::Diff prolongate   l2: 2.44876e-14
-DEAL::Diff restrict     l1: 1.39371e-14
-DEAL::Diff restrict add l1: 1.40486e-14
-DEAL::Diff restrict     l2: 3.01096e-14
-DEAL::Diff restrict add l2: 3.04007e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 256
-DEAL::Diff prolongate   l1: 4.17590e-15
-DEAL::Diff prolongate   l2: 8.04385e-15
-DEAL::Diff prolongate   l3: 1.69164e-14
-DEAL::Diff prolongate   l4: 3.01529e-14
-DEAL::Diff restrict     l1: 5.63597e-15
-DEAL::Diff restrict add l1: 5.77743e-15
-DEAL::Diff restrict     l2: 8.48405e-15
-DEAL::Diff restrict add l2: 8.51694e-15
-DEAL::Diff restrict     l3: 1.80946e-14
-DEAL::Diff restrict add l3: 1.82188e-14
-DEAL::Diff restrict     l4: 3.73413e-14
-DEAL::Diff restrict add l4: 3.78568e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(1)
 DEAL::no. cells: 8
-DEAL::Diff prolongate   l1: 6.26264e-15
-DEAL::Diff restrict     l1: 8.93712e-15
-DEAL::Diff restrict add l1: 8.88178e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 6.06434e-15
-DEAL::Diff prolongate   l2: 1.83570e-14
-DEAL::Diff restrict     l1: 9.85038e-15
-DEAL::Diff restrict add l1: 9.85038e-15
-DEAL::Diff restrict     l2: 1.95046e-14
-DEAL::Diff restrict add l2: 1.98056e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 216
-DEAL::Diff prolongate   l1: 3.47805e-14
-DEAL::Diff restrict     l1: 3.70062e-14
-DEAL::Diff restrict add l1: 3.71472e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 512
-DEAL::Diff prolongate   l1: 6.66186e-15
-DEAL::Diff prolongate   l2: 1.67515e-14
-DEAL::Diff prolongate   l3: 4.69783e-14
-DEAL::Diff restrict     l1: 7.54952e-15
-DEAL::Diff restrict add l1: 7.64040e-15
-DEAL::Diff restrict     l2: 2.00530e-14
-DEAL::Diff restrict add l2: 1.98106e-14
-DEAL::Diff restrict     l3: 5.94217e-14
-DEAL::Diff restrict add l3: 6.00112e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1000
-DEAL::Diff prolongate   l1: 7.03733e-14
-DEAL::Diff restrict     l1: 7.72919e-14
-DEAL::Diff restrict add l1: 7.76890e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 1728
-DEAL::Diff prolongate   l1: 3.07111e-14
-DEAL::Diff prolongate   l2: 9.33457e-14
-DEAL::Diff restrict     l1: 3.79144e-14
-DEAL::Diff restrict add l1: 3.78858e-14
-DEAL::Diff restrict     l2: 1.05024e-13
-DEAL::Diff restrict add l2: 1.04961e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 4096
-DEAL::Diff prolongate   l1: 5.64824e-15
-DEAL::Diff prolongate   l2: 1.64036e-14
-DEAL::Diff prolongate   l3: 4.73163e-14
-DEAL::Diff prolongate   l4: 1.35130e-13
-DEAL::Diff restrict     l1: 7.65329e-15
-DEAL::Diff restrict add l1: 7.53644e-15
-DEAL::Diff restrict     l2: 1.85617e-14
-DEAL::Diff restrict add l2: 1.87677e-14
-DEAL::Diff restrict     l3: 5.38796e-14
-DEAL::Diff restrict add l3: 5.39655e-14
-DEAL::Diff restrict     l4: 1.62515e-13
-DEAL::Diff restrict add l4: 1.63441e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(3)
 DEAL::no. cells: 1
 DEAL::
 DEAL::no. cells: 8
-DEAL::Diff prolongate   l1: 2.07550e-14
-DEAL::Diff restrict     l1: 3.17665e-14
-DEAL::Diff restrict add l1: 3.04347e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 27
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 2.16043e-14
-DEAL::Diff prolongate   l2: 6.97648e-14
-DEAL::Diff restrict     l1: 2.62811e-14
-DEAL::Diff restrict add l1: 2.62764e-14
-DEAL::Diff restrict     l2: 8.47034e-14
-DEAL::Diff restrict add l2: 8.35694e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 125
 DEAL::
 DEAL::no. cells: 216
-DEAL::Diff prolongate   l1: 1.21325e-13
-DEAL::Diff restrict     l1: 1.62972e-13
-DEAL::Diff restrict add l1: 1.63420e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 512
-DEAL::Diff prolongate   l1: 2.08490e-14
-DEAL::Diff prolongate   l2: 6.90654e-14
-DEAL::Diff prolongate   l3: 1.86892e-13
-DEAL::Diff restrict     l1: 2.57474e-14
-DEAL::Diff restrict add l1: 2.57966e-14
-DEAL::Diff restrict     l2: 8.10542e-14
-DEAL::Diff restrict add l2: 8.13582e-14
-DEAL::Diff restrict     l3: 2.49352e-13
-DEAL::Diff restrict add l3: 2.49525e-13
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 2.49702e-13
+DEAL::Diff restrict add l3: 2.50034e-13
 DEAL::
 DEAL::FE: FE_DGQ<2>(2)
 DEAL::no. cells: 16
-DEAL::Diff prolongate   l1: 1.03142e-07
-DEAL::Diff prolongate   l2: 2.69884e-07
-DEAL::Diff restrict     l1: 4.61353e-07
-DEAL::Diff restrict add l1: 4.63422e-07
-DEAL::Diff restrict     l2: 4.53159e-07
-DEAL::Diff restrict add l2: 8.46332e-07
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 6.25860e-08
-DEAL::Diff prolongate   l2: 2.00862e-07
-DEAL::Diff prolongate   l3: 4.35015e-07
-DEAL::Diff restrict     l1: 3.22744e-07
-DEAL::Diff restrict add l1: 3.21602e-07
-DEAL::Diff restrict     l2: 6.07215e-07
-DEAL::Diff restrict add l2: 6.93588e-07
-DEAL::Diff restrict     l3: 1.27045e-06
-DEAL::Diff restrict add l3: 1.46317e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 144
-DEAL::Diff prolongate   l1: 3.02302e-07
-DEAL::Diff prolongate   l2: 6.16787e-07
-DEAL::Diff restrict     l1: 9.79549e-07
-DEAL::Diff restrict add l1: 1.07507e-06
-DEAL::Diff restrict     l2: 1.96566e-06
-DEAL::Diff restrict add l2: 2.26399e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 256
-DEAL::Diff prolongate   l1: 1.01531e-07
-DEAL::Diff prolongate   l2: 1.75564e-07
-DEAL::Diff prolongate   l3: 3.97819e-07
-DEAL::Diff prolongate   l4: 9.28225e-07
-DEAL::Diff restrict     l1: 3.64560e-07
-DEAL::Diff restrict add l1: 3.64560e-07
-DEAL::Diff restrict     l2: 7.09148e-07
-DEAL::Diff restrict add l2: 9.56950e-07
-DEAL::Diff restrict     l3: 1.18101e-06
-DEAL::Diff restrict add l3: 1.41903e-06
-DEAL::Diff restrict     l4: 2.96347e-06
-DEAL::Diff restrict add l4: 3.34960e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::no. cells: 400
-DEAL::Diff prolongate   l1: 5.54739e-07
-DEAL::Diff prolongate   l2: 1.07782e-06
-DEAL::Diff restrict     l1: 1.76930e-06
-DEAL::Diff restrict add l1: 1.98210e-06
-DEAL::Diff restrict     l2: 3.45316e-06
-DEAL::Diff restrict add l2: 4.00761e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 576
-DEAL::Diff prolongate   l1: 3.26449e-07
-DEAL::Diff prolongate   l2: 6.91946e-07
-DEAL::Diff prolongate   l3: 1.32482e-06
-DEAL::Diff restrict     l1: 9.15409e-07
-DEAL::Diff restrict add l1: 1.49164e-06
-DEAL::Diff restrict     l2: 2.39068e-06
-DEAL::Diff restrict add l2: 2.53775e-06
-DEAL::Diff restrict     l3: 4.14853e-06
-DEAL::Diff restrict add l3: 4.68261e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1024
-DEAL::Diff prolongate   l1: 7.85624e-08
-DEAL::Diff prolongate   l2: 1.80989e-07
-DEAL::Diff prolongate   l3: 4.04502e-07
-DEAL::Diff prolongate   l4: 8.48657e-07
-DEAL::Diff prolongate   l5: 1.93481e-06
-DEAL::Diff restrict     l1: 5.06157e-07
-DEAL::Diff restrict add l1: 5.46499e-07
-DEAL::Diff restrict     l2: 6.07561e-07
-DEAL::Diff restrict add l2: 7.11187e-07
-DEAL::Diff restrict     l3: 1.08304e-06
-DEAL::Diff restrict add l3: 1.46089e-06
-DEAL::Diff restrict     l4: 3.01682e-06
-DEAL::Diff restrict add l4: 3.37082e-06
-DEAL::Diff restrict     l5: 5.82651e-06
-DEAL::Diff restrict add l5: 6.63656e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(2)
 DEAL::no. cells: 8
-DEAL::Diff prolongate   l1: 3.51492e-07
-DEAL::Diff restrict     l1: 1.22169e-06
-DEAL::Diff restrict add l1: 1.50747e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 64
-DEAL::Diff prolongate   l1: 3.05058e-07
-DEAL::Diff prolongate   l2: 8.95859e-07
-DEAL::Diff restrict     l1: 8.66897e-07
-DEAL::Diff restrict add l1: 9.16041e-07
-DEAL::Diff restrict     l2: 3.94757e-06
-DEAL::Diff restrict add l2: 4.16861e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 216
-DEAL::Diff prolongate   l1: 1.68962e-06
-DEAL::Diff restrict     l1: 6.50732e-06
-DEAL::Diff restrict add l1: 7.09783e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 512
-DEAL::Diff prolongate   l1: 3.35867e-07
-DEAL::Diff prolongate   l2: 9.61350e-07
-DEAL::Diff prolongate   l3: 2.71405e-06
-DEAL::Diff restrict     l1: 2.15094e-06
-DEAL::Diff restrict add l1: 2.19592e-06
-DEAL::Diff restrict     l2: 3.90282e-06
-DEAL::Diff restrict add l2: 4.05542e-06
-DEAL::Diff restrict     l3: 1.25231e-05
-DEAL::Diff restrict add l3: 1.31345e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::no. cells: 1000
-DEAL::Diff prolongate   l1: 3.78055e-06
-DEAL::Diff restrict     l1: 1.65356e-05
-DEAL::Diff restrict add l1: 1.74206e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
 DEAL::
 DEAL::no. cells: 1728
-DEAL::Diff prolongate   l1: 1.69285e-06
-DEAL::Diff prolongate   l2: 4.89969e-06
-DEAL::Diff restrict     l1: 7.37001e-06
-DEAL::Diff restrict add l1: 7.89271e-06
-DEAL::Diff restrict     l2: 2.05570e-05
-DEAL::Diff restrict add l2: 2.21024e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 4096
-DEAL::Diff prolongate   l1: 3.05557e-07
-DEAL::Diff prolongate   l2: 9.52411e-07
-DEAL::Diff prolongate   l3: 2.69021e-06
-DEAL::Diff prolongate   l4: 7.67969e-06
-DEAL::Diff restrict     l1: 6.93816e-07
-DEAL::Diff restrict add l1: 7.94372e-07
-DEAL::Diff restrict     l2: 5.91124e-06
-DEAL::Diff restrict add l2: 6.13331e-06
-DEAL::Diff restrict     l3: 1.12329e-05
-DEAL::Diff restrict add l3: 1.20339e-05
-DEAL::Diff restrict     l4: 3.24033e-05
-DEAL::Diff restrict add l4: 3.46803e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
diff --git a/tests/multigrid/transfer_matrix_free_05.cc b/tests/multigrid/transfer_matrix_free_05.cc
index 7c3b17b6bb..b994f49376 100644
--- a/tests/multigrid/transfer_matrix_free_05.cc
+++ b/tests/multigrid/transfer_matrix_free_05.cc
@@ -87,6 +87,8 @@ void check(const unsigned int fe_degree)
       MGTransferMatrixFree<dim, Number> transfer;
       transfer.build(mgdof);
 
+      const double tolerance = 1000. * std::numeric_limits<Number>::epsilon();
+
       // check prolongation for all levels using random vector
       for (unsigned int level=1; level<mgdof.get_triangulation().n_global_levels(); ++level)
         {
@@ -102,7 +104,8 @@ void check(const unsigned int fe_degree)
           transfer_ref.prolongate(level, v3, v1_cpy);
           v2_cpy = v2;
           v3 -= v2_cpy;
-          deallog << "Diff prolongate   l" << level << ": " << v3.l2_norm() << std::endl;
+          deallog << "Diff prolongate   l" << level << ": "
+                  << filter_out_small_numbers(v3.l2_norm(), tolerance) << std::endl;
         }
 
       // check restriction for all levels using random vector
@@ -120,7 +123,8 @@ void check(const unsigned int fe_degree)
           transfer_ref.restrict_and_add(level, v3, v1_cpy);
           v2_cpy = v2;
           v3 -= v2_cpy;
-          deallog << "Diff restrict     l" << level << ": " << v3.l2_norm() << std::endl;
+          deallog << "Diff restrict     l" << level << ": "
+                  << filter_out_small_numbers(v3.l2_norm(), tolerance) << std::endl;
 
           v2 = 1.;
           v3 = 1.;
@@ -128,7 +132,8 @@ void check(const unsigned int fe_degree)
           transfer_ref.restrict_and_add(level, v3, v1_cpy);
           v2_cpy = v2;
           v3 -= v2_cpy;
-          deallog << "Diff restrict add l" << level << ": " << v3.l2_norm() << std::endl;
+          deallog << "Diff restrict add l" << level << ": "
+                  << filter_out_small_numbers(v3.l2_norm(), tolerance) << std::endl;
         }
       deallog << std::endl;
     }
diff --git a/tests/multigrid/transfer_matrix_free_05.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=1.output b/tests/multigrid/transfer_matrix_free_05.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=1.output
index dc7b8ccdfa..5777a0a2e6 100644
--- a/tests/multigrid/transfer_matrix_free_05.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=1.output
+++ b/tests/multigrid/transfer_matrix_free_05.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=1.output
@@ -1,259 +1,259 @@
 
 DEAL::FE: FE_DGQ<2>(1)
 DEAL::no. cells: 88
-DEAL::Diff prolongate   l1: 2.42730e-15
-DEAL::Diff prolongate   l2: 4.63485e-15
-DEAL::Diff prolongate   l3: 5.60489e-15
-DEAL::Diff prolongate   l4: 6.81795e-15
-DEAL::Diff prolongate   l5: 4.34350e-15
-DEAL::Diff restrict     l1: 5.43896e-16
-DEAL::Diff restrict add l1: 6.28037e-16
-DEAL::Diff restrict     l2: 1.71995e-15
-DEAL::Diff restrict add l2: 1.98603e-15
-DEAL::Diff restrict     l3: 3.61462e-15
-DEAL::Diff restrict add l3: 3.55271e-15
-DEAL::Diff restrict     l4: 4.45751e-15
-DEAL::Diff restrict add l4: 4.52884e-15
-DEAL::Diff restrict     l5: 2.29685e-15
-DEAL::Diff restrict add l5: 2.43238e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 250
-DEAL::Diff prolongate   l1: 1.57653e-15
-DEAL::Diff prolongate   l2: 3.94532e-15
-DEAL::Diff prolongate   l3: 8.52429e-15
-DEAL::Diff prolongate   l4: 7.72391e-15
-DEAL::Diff prolongate   l5: 1.03049e-14
-DEAL::Diff prolongate   l6: 1.03487e-14
-DEAL::Diff restrict     l1: 9.15513e-16
-DEAL::Diff restrict add l1: 1.08779e-15
-DEAL::Diff restrict     l2: 2.40178e-15
-DEAL::Diff restrict add l2: 2.34990e-15
-DEAL::Diff restrict     l3: 4.88498e-15
-DEAL::Diff restrict add l3: 5.27327e-15
-DEAL::Diff restrict     l4: 4.83425e-15
-DEAL::Diff restrict add l4: 4.74158e-15
-DEAL::Diff restrict     l5: 6.64652e-15
-DEAL::Diff restrict add l5: 6.64652e-15
-DEAL::Diff restrict     l6: 6.50026e-15
-DEAL::Diff restrict add l6: 6.69088e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff prolongate   l6: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
+DEAL::Diff restrict     l6: 0.00000
+DEAL::Diff restrict add l6: 0.00000
 DEAL::
 DEAL::no. cells: 510
-DEAL::Diff prolongate   l1: 7.32745e-15
-DEAL::Diff prolongate   l2: 1.24667e-14
-DEAL::Diff prolongate   l3: 1.04452e-14
-DEAL::Diff prolongate   l4: 1.25007e-14
-DEAL::Diff prolongate   l5: 1.52406e-14
-DEAL::Diff restrict     l1: 3.57347e-15
-DEAL::Diff restrict add l1: 3.79430e-15
-DEAL::Diff restrict     l2: 7.76521e-15
-DEAL::Diff restrict add l2: 8.07034e-15
-DEAL::Diff restrict     l3: 6.91287e-15
-DEAL::Diff restrict add l3: 6.99705e-15
-DEAL::Diff restrict     l4: 8.75318e-15
-DEAL::Diff restrict add l4: 9.17665e-15
-DEAL::Diff restrict     l5: 1.00369e-14
-DEAL::Diff restrict add l5: 1.01268e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<2>(3)
 DEAL::no. cells: 34
-DEAL::Diff prolongate   l1: 3.17155e-15
-DEAL::Diff prolongate   l2: 8.03169e-15
-DEAL::Diff prolongate   l3: 8.46844e-15
-DEAL::Diff prolongate   l4: 5.45685e-15
-DEAL::Diff restrict     l1: 4.22505e-15
-DEAL::Diff restrict add l1: 4.10032e-15
-DEAL::Diff restrict     l2: 8.41685e-15
-DEAL::Diff restrict add l2: 8.52200e-15
-DEAL::Diff restrict     l3: 1.04263e-14
-DEAL::Diff restrict add l3: 1.06048e-14
-DEAL::Diff restrict     l4: 5.76916e-15
-DEAL::Diff restrict add l4: 5.74319e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::no. cells: 88
-DEAL::Diff prolongate   l1: 3.52892e-15
-DEAL::Diff prolongate   l2: 7.21989e-15
-DEAL::Diff prolongate   l3: 1.11264e-14
-DEAL::Diff prolongate   l4: 1.23134e-14
-DEAL::Diff prolongate   l5: 9.46521e-15
-DEAL::Diff restrict     l1: 4.74011e-15
-DEAL::Diff restrict add l1: 4.73637e-15
-DEAL::Diff restrict     l2: 9.57972e-15
-DEAL::Diff restrict add l2: 9.49614e-15
-DEAL::Diff restrict     l3: 1.34109e-14
-DEAL::Diff restrict add l3: 1.35888e-14
-DEAL::Diff restrict     l4: 1.47323e-14
-DEAL::Diff restrict add l4: 1.49233e-14
-DEAL::Diff restrict     l5: 1.19657e-14
-DEAL::Diff restrict add l5: 1.25017e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 141
-DEAL::Diff prolongate   l1: 1.13335e-14
-DEAL::Diff prolongate   l2: 1.18767e-14
-DEAL::Diff prolongate   l3: 1.45351e-14
-DEAL::Diff prolongate   l4: 1.44151e-14
-DEAL::Diff restrict     l1: 1.39577e-14
-DEAL::Diff restrict add l1: 1.41099e-14
-DEAL::Diff restrict     l2: 1.19770e-14
-DEAL::Diff restrict add l2: 1.20366e-14
-DEAL::Diff restrict     l3: 1.68113e-14
-DEAL::Diff restrict add l3: 1.72113e-14
-DEAL::Diff restrict     l4: 1.65350e-14
-DEAL::Diff restrict add l4: 1.65159e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(1)
 DEAL::no. cells: 15
-DEAL::Diff prolongate   l1: 6.59696e-15
-DEAL::Diff prolongate   l2: 7.72987e-15
-DEAL::Diff restrict     l1: 6.26465e-15
-DEAL::Diff restrict add l1: 6.04027e-15
-DEAL::Diff restrict     l2: 5.65233e-15
-DEAL::Diff restrict add l2: 5.47510e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 694
-DEAL::Diff prolongate   l1: 6.08938e-15
-DEAL::Diff prolongate   l2: 1.88601e-14
-DEAL::Diff prolongate   l3: 2.61961e-14
-DEAL::Diff prolongate   l4: 3.77203e-14
-DEAL::Diff prolongate   l5: 3.45207e-14
-DEAL::Diff restrict     l1: 9.06856e-15
-DEAL::Diff restrict add l1: 9.01403e-15
-DEAL::Diff restrict     l2: 1.94032e-14
-DEAL::Diff restrict add l2: 1.93625e-14
-DEAL::Diff restrict     l3: 3.51027e-14
-DEAL::Diff restrict add l3: 3.51925e-14
-DEAL::Diff restrict     l4: 4.22585e-14
-DEAL::Diff restrict add l4: 4.25330e-14
-DEAL::Diff restrict     l5: 4.38278e-14
-DEAL::Diff restrict add l5: 4.40186e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 1791
-DEAL::Diff prolongate   l1: 3.29057e-14
-DEAL::Diff prolongate   l2: 3.15614e-14
-DEAL::Diff prolongate   l3: 5.45700e-14
-DEAL::Diff prolongate   l4: 6.86807e-14
-DEAL::Diff restrict     l1: 3.55160e-14
-DEAL::Diff restrict add l1: 3.55188e-14
-DEAL::Diff restrict     l2: 3.62933e-14
-DEAL::Diff restrict add l2: 3.68246e-14
-DEAL::Diff restrict     l3: 6.28476e-14
-DEAL::Diff restrict add l3: 6.34675e-14
-DEAL::Diff restrict     l4: 8.06814e-14
-DEAL::Diff restrict add l4: 8.09742e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(3)
 DEAL::no. cells: 1
 DEAL::
 DEAL::no. cells: 15
-DEAL::Diff prolongate   l1: 2.38740e-14
-DEAL::Diff prolongate   l2: 2.34616e-14
-DEAL::Diff restrict     l1: 3.23761e-14
-DEAL::Diff restrict add l1: 3.23401e-14
-DEAL::Diff restrict     l2: 3.06397e-14
-DEAL::Diff restrict add l2: 3.05713e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 223
-DEAL::Diff prolongate   l1: 6.34259e-14
-DEAL::Diff prolongate   l2: 9.25034e-14
-DEAL::Diff prolongate   l3: 6.01484e-14
-DEAL::Diff restrict     l1: 7.53425e-14
-DEAL::Diff restrict add l1: 7.56057e-14
-DEAL::Diff restrict     l2: 1.22168e-13
-DEAL::Diff restrict add l2: 1.22009e-13
-DEAL::Diff restrict     l3: 8.10539e-14
-DEAL::Diff restrict add l3: 8.11429e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<2>(2)
 DEAL::no. cells: 88
-DEAL::Diff prolongate   l1: 9.17867e-08
-DEAL::Diff prolongate   l2: 3.11462e-07
-DEAL::Diff prolongate   l3: 3.20218e-07
-DEAL::Diff prolongate   l4: 3.27057e-07
-DEAL::Diff prolongate   l5: 3.30873e-07
-DEAL::Diff restrict     l1: 2.63011e-07
-DEAL::Diff restrict add l1: 3.27456e-07
-DEAL::Diff restrict     l2: 5.76624e-07
-DEAL::Diff restrict add l2: 6.02010e-07
-DEAL::Diff restrict     l3: 9.47801e-07
-DEAL::Diff restrict add l3: 1.07815e-06
-DEAL::Diff restrict     l4: 1.01919e-06
-DEAL::Diff restrict add l4: 1.26875e-06
-DEAL::Diff restrict     l5: 6.94877e-07
-DEAL::Diff restrict add l5: 1.21398e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 250
-DEAL::Diff prolongate   l1: 1.80752e-07
-DEAL::Diff prolongate   l2: 2.31534e-07
-DEAL::Diff prolongate   l3: 5.53246e-07
-DEAL::Diff prolongate   l4: 4.53619e-07
-DEAL::Diff prolongate   l5: 5.36476e-07
-DEAL::Diff prolongate   l6: 5.03932e-07
-DEAL::Diff restrict     l1: 8.43436e-07
-DEAL::Diff restrict add l1: 8.68013e-07
-DEAL::Diff restrict     l2: 7.80952e-07
-DEAL::Diff restrict add l2: 1.18049e-06
-DEAL::Diff restrict     l3: 1.76733e-06
-DEAL::Diff restrict add l3: 1.88048e-06
-DEAL::Diff restrict     l4: 1.33758e-06
-DEAL::Diff restrict add l4: 1.37294e-06
-DEAL::Diff restrict     l5: 1.81711e-06
-DEAL::Diff restrict add l5: 1.98144e-06
-DEAL::Diff restrict     l6: 1.71118e-06
-DEAL::Diff restrict add l6: 2.14036e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff prolongate   l6: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
+DEAL::Diff restrict     l6: 0.00000
+DEAL::Diff restrict add l6: 0.00000
 DEAL::
 DEAL::no. cells: 510
-DEAL::Diff prolongate   l1: 3.52809e-07
-DEAL::Diff prolongate   l2: 7.00511e-07
-DEAL::Diff prolongate   l3: 6.37068e-07
-DEAL::Diff prolongate   l4: 7.64416e-07
-DEAL::Diff prolongate   l5: 8.03199e-07
-DEAL::Diff restrict     l1: 9.72974e-07
-DEAL::Diff restrict add l1: 1.28581e-06
-DEAL::Diff restrict     l2: 2.21812e-06
-DEAL::Diff restrict add l2: 2.49336e-06
-DEAL::Diff restrict     l3: 1.93140e-06
-DEAL::Diff restrict add l3: 2.35649e-06
-DEAL::Diff restrict     l4: 2.20419e-06
-DEAL::Diff restrict add l4: 2.38412e-06
-DEAL::Diff restrict     l5: 2.51674e-06
-DEAL::Diff restrict add l5: 2.85789e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(2)
 DEAL::no. cells: 15
-DEAL::Diff prolongate   l1: 3.06077e-07
-DEAL::Diff prolongate   l2: 3.27927e-07
-DEAL::Diff restrict     l1: 1.04282e-06
-DEAL::Diff restrict add l1: 1.07885e-06
-DEAL::Diff restrict     l2: 1.49395e-06
-DEAL::Diff restrict add l2: 1.52414e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 694
-DEAL::Diff prolongate   l1: 2.89637e-07
-DEAL::Diff prolongate   l2: 1.02274e-06
-DEAL::Diff prolongate   l3: 1.48371e-06
-DEAL::Diff prolongate   l4: 2.08384e-06
-DEAL::Diff prolongate   l5: 1.76456e-06
-DEAL::Diff restrict     l1: 1.19660e-06
-DEAL::Diff restrict add l1: 1.29435e-06
-DEAL::Diff restrict     l2: 4.00310e-06
-DEAL::Diff restrict add l2: 3.98643e-06
-DEAL::Diff restrict     l3: 6.68544e-06
-DEAL::Diff restrict add l3: 7.15226e-06
-DEAL::Diff restrict     l4: 9.33249e-06
-DEAL::Diff restrict add l4: 9.96913e-06
-DEAL::Diff restrict     l5: 7.49192e-06
-DEAL::Diff restrict add l5: 8.25942e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 1791
-DEAL::Diff prolongate   l1: 1.73059e-06
-DEAL::Diff prolongate   l2: 1.75705e-06
-DEAL::Diff prolongate   l3: 3.03065e-06
-DEAL::Diff prolongate   l4: 3.63764e-06
-DEAL::Diff restrict     l1: 7.13347e-06
-DEAL::Diff restrict add l1: 7.63449e-06
-DEAL::Diff restrict     l2: 7.32363e-06
-DEAL::Diff restrict add l2: 7.83181e-06
-DEAL::Diff restrict     l3: 1.27796e-05
-DEAL::Diff restrict add l3: 1.35914e-05
-DEAL::Diff restrict     l4: 1.64461e-05
-DEAL::Diff restrict add l4: 1.74351e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
diff --git a/tests/multigrid/transfer_matrix_free_05.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=5.output b/tests/multigrid/transfer_matrix_free_05.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=5.output
index acb44eeba9..5777a0a2e6 100644
--- a/tests/multigrid/transfer_matrix_free_05.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=5.output
+++ b/tests/multigrid/transfer_matrix_free_05.with_mpi=true.with_p4est=true.with_trilinos=true.mpirun=5.output
@@ -1,259 +1,259 @@
 
 DEAL::FE: FE_DGQ<2>(1)
 DEAL::no. cells: 88
-DEAL::Diff prolongate   l1: 2.42730e-15
-DEAL::Diff prolongate   l2: 4.65368e-15
-DEAL::Diff prolongate   l3: 6.10375e-15
-DEAL::Diff prolongate   l4: 7.04242e-15
-DEAL::Diff prolongate   l5: 5.56110e-15
-DEAL::Diff restrict     l1: 1.60119e-15
-DEAL::Diff restrict add l1: 1.60119e-15
-DEAL::Diff restrict     l2: 2.03507e-15
-DEAL::Diff restrict add l2: 2.22045e-15
-DEAL::Diff restrict     l3: 3.19467e-15
-DEAL::Diff restrict add l3: 3.29345e-15
-DEAL::Diff restrict     l4: 3.55271e-15
-DEAL::Diff restrict add l4: 3.71552e-15
-DEAL::Diff restrict     l5: 2.68298e-15
-DEAL::Diff restrict add l5: 3.01196e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 250
-DEAL::Diff prolongate   l1: 2.35694e-15
-DEAL::Diff prolongate   l2: 5.57399e-15
-DEAL::Diff prolongate   l3: 8.18221e-15
-DEAL::Diff prolongate   l4: 8.75579e-15
-DEAL::Diff prolongate   l5: 1.12793e-14
-DEAL::Diff prolongate   l6: 1.01444e-14
-DEAL::Diff restrict     l1: 9.93014e-16
-DEAL::Diff restrict add l1: 9.93014e-16
-DEAL::Diff restrict     l2: 2.65759e-15
-DEAL::Diff restrict add l2: 2.59897e-15
-DEAL::Diff restrict     l3: 4.92018e-15
-DEAL::Diff restrict add l3: 4.88498e-15
-DEAL::Diff restrict     l4: 4.10032e-15
-DEAL::Diff restrict add l4: 4.39626e-15
-DEAL::Diff restrict     l5: 6.27644e-15
-DEAL::Diff restrict add l5: 6.99352e-15
-DEAL::Diff restrict     l6: 7.15039e-15
-DEAL::Diff restrict add l6: 7.54952e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff prolongate   l6: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
+DEAL::Diff restrict     l6: 0.00000
+DEAL::Diff restrict add l6: 0.00000
 DEAL::
 DEAL::no. cells: 510
-DEAL::Diff prolongate   l1: 5.96603e-15
-DEAL::Diff prolongate   l2: 1.30851e-14
-DEAL::Diff prolongate   l3: 1.09245e-14
-DEAL::Diff prolongate   l4: 1.40643e-14
-DEAL::Diff prolongate   l5: 1.55790e-14
-DEAL::Diff restrict     l1: 4.04127e-15
-DEAL::Diff restrict add l1: 4.00297e-15
-DEAL::Diff restrict     l2: 8.51621e-15
-DEAL::Diff restrict add l2: 8.69383e-15
-DEAL::Diff restrict     l3: 7.35182e-15
-DEAL::Diff restrict add l3: 7.38110e-15
-DEAL::Diff restrict     l4: 8.41502e-15
-DEAL::Diff restrict add l4: 8.60262e-15
-DEAL::Diff restrict     l5: 9.99016e-15
-DEAL::Diff restrict add l5: 1.02189e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<2>(3)
 DEAL::no. cells: 34
-DEAL::Diff prolongate   l1: 4.17131e-15
-DEAL::Diff prolongate   l2: 8.41667e-15
-DEAL::Diff prolongate   l3: 7.96119e-15
-DEAL::Diff prolongate   l4: 4.42038e-15
-DEAL::Diff restrict     l1: 3.68745e-15
-DEAL::Diff restrict add l1: 3.66205e-15
-DEAL::Diff restrict     l2: 9.22562e-15
-DEAL::Diff restrict add l2: 9.18873e-15
-DEAL::Diff restrict     l3: 9.94210e-15
-DEAL::Diff restrict add l3: 9.94502e-15
-DEAL::Diff restrict     l4: 6.65914e-15
-DEAL::Diff restrict add l4: 6.70928e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::no. cells: 88
-DEAL::Diff prolongate   l1: 3.40743e-15
-DEAL::Diff prolongate   l2: 7.39654e-15
-DEAL::Diff prolongate   l3: 1.06370e-14
-DEAL::Diff prolongate   l4: 1.19581e-14
-DEAL::Diff prolongate   l5: 9.34608e-15
-DEAL::Diff restrict     l1: 6.04033e-15
-DEAL::Diff restrict add l1: 6.11329e-15
-DEAL::Diff restrict     l2: 9.91651e-15
-DEAL::Diff restrict add l2: 9.85788e-15
-DEAL::Diff restrict     l3: 1.31993e-14
-DEAL::Diff restrict add l3: 1.33476e-14
-DEAL::Diff restrict     l4: 1.48527e-14
-DEAL::Diff restrict add l4: 1.48579e-14
-DEAL::Diff restrict     l5: 1.19310e-14
-DEAL::Diff restrict add l5: 1.21720e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 141
-DEAL::Diff prolongate   l1: 1.11899e-14
-DEAL::Diff prolongate   l2: 1.16846e-14
-DEAL::Diff prolongate   l3: 1.51778e-14
-DEAL::Diff prolongate   l4: 1.33316e-14
-DEAL::Diff restrict     l1: 1.39003e-14
-DEAL::Diff restrict add l1: 1.37923e-14
-DEAL::Diff restrict     l2: 1.43074e-14
-DEAL::Diff restrict add l2: 1.47764e-14
-DEAL::Diff restrict     l3: 1.79785e-14
-DEAL::Diff restrict add l3: 1.80468e-14
-DEAL::Diff restrict     l4: 1.63117e-14
-DEAL::Diff restrict add l4: 1.63044e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(1)
 DEAL::no. cells: 15
-DEAL::Diff prolongate   l1: 6.12839e-15
-DEAL::Diff prolongate   l2: 7.68203e-15
-DEAL::Diff restrict     l1: 6.57192e-15
-DEAL::Diff restrict add l1: 6.60186e-15
-DEAL::Diff restrict     l2: 7.45753e-15
-DEAL::Diff restrict add l2: 7.69185e-15
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 694
-DEAL::Diff prolongate   l1: 3.54546e-15
-DEAL::Diff prolongate   l2: 1.57343e-14
-DEAL::Diff prolongate   l3: 2.90876e-14
-DEAL::Diff prolongate   l4: 3.99611e-14
-DEAL::Diff prolongate   l5: 3.59884e-14
-DEAL::Diff restrict     l1: 5.90822e-15
-DEAL::Diff restrict add l1: 5.89151e-15
-DEAL::Diff restrict     l2: 2.08580e-14
-DEAL::Diff restrict add l2: 2.13394e-14
-DEAL::Diff restrict     l3: 3.14270e-14
-DEAL::Diff restrict add l3: 3.10609e-14
-DEAL::Diff restrict     l4: 4.23355e-14
-DEAL::Diff restrict add l4: 4.23588e-14
-DEAL::Diff restrict     l5: 4.02752e-14
-DEAL::Diff restrict add l5: 4.01674e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 1791
-DEAL::Diff prolongate   l1: 3.08167e-14
-DEAL::Diff prolongate   l2: 3.40085e-14
-DEAL::Diff prolongate   l3: 5.26770e-14
-DEAL::Diff prolongate   l4: 6.79970e-14
-DEAL::Diff restrict     l1: 3.51729e-14
-DEAL::Diff restrict add l1: 3.51673e-14
-DEAL::Diff restrict     l2: 3.59164e-14
-DEAL::Diff restrict add l2: 3.63041e-14
-DEAL::Diff restrict     l3: 6.09924e-14
-DEAL::Diff restrict add l3: 6.16501e-14
-DEAL::Diff restrict     l4: 7.84845e-14
-DEAL::Diff restrict add l4: 7.93156e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(3)
 DEAL::no. cells: 1
 DEAL::
 DEAL::no. cells: 15
-DEAL::Diff prolongate   l1: 2.33378e-14
-DEAL::Diff prolongate   l2: 2.41578e-14
-DEAL::Diff restrict     l1: 2.75986e-14
-DEAL::Diff restrict add l1: 2.77120e-14
-DEAL::Diff restrict     l2: 2.84487e-14
-DEAL::Diff restrict add l2: 2.84486e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 223
-DEAL::Diff prolongate   l1: 6.15027e-14
-DEAL::Diff prolongate   l2: 8.99854e-14
-DEAL::Diff prolongate   l3: 5.10249e-14
-DEAL::Diff restrict     l1: 7.28331e-14
-DEAL::Diff restrict add l1: 7.27565e-14
-DEAL::Diff restrict     l2: 1.17604e-13
-DEAL::Diff restrict add l2: 1.18098e-13
-DEAL::Diff restrict     l3: 7.66222e-14
-DEAL::Diff restrict add l3: 7.65525e-14
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<2>(2)
 DEAL::no. cells: 88
-DEAL::Diff prolongate   l1: 8.80750e-08
-DEAL::Diff prolongate   l2: 2.32126e-07
-DEAL::Diff prolongate   l3: 3.49252e-07
-DEAL::Diff prolongate   l4: 3.71788e-07
-DEAL::Diff prolongate   l5: 3.89546e-07
-DEAL::Diff restrict     l1: 2.05689e-07
-DEAL::Diff restrict add l1: 2.35921e-07
-DEAL::Diff restrict     l2: 6.46161e-07
-DEAL::Diff restrict add l2: 8.53976e-07
-DEAL::Diff restrict     l3: 1.10133e-06
-DEAL::Diff restrict add l3: 1.32253e-06
-DEAL::Diff restrict     l4: 1.20100e-06
-DEAL::Diff restrict add l4: 1.29764e-06
-DEAL::Diff restrict     l5: 7.85391e-07
-DEAL::Diff restrict add l5: 8.58580e-07
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 250
-DEAL::Diff prolongate   l1: 1.70304e-07
-DEAL::Diff prolongate   l2: 1.80863e-07
-DEAL::Diff prolongate   l3: 4.37828e-07
-DEAL::Diff prolongate   l4: 4.44354e-07
-DEAL::Diff prolongate   l5: 5.50270e-07
-DEAL::Diff prolongate   l6: 5.91192e-07
-DEAL::Diff restrict     l1: 4.46472e-07
-DEAL::Diff restrict add l1: 4.47186e-07
-DEAL::Diff restrict     l2: 6.03085e-07
-DEAL::Diff restrict add l2: 7.56254e-07
-DEAL::Diff restrict     l3: 1.34162e-06
-DEAL::Diff restrict add l3: 1.81144e-06
-DEAL::Diff restrict     l4: 1.31130e-06
-DEAL::Diff restrict add l4: 1.61412e-06
-DEAL::Diff restrict     l5: 1.61300e-06
-DEAL::Diff restrict add l5: 1.82997e-06
-DEAL::Diff restrict     l6: 1.66056e-06
-DEAL::Diff restrict add l6: 1.88641e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff prolongate   l6: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
+DEAL::Diff restrict     l6: 0.00000
+DEAL::Diff restrict add l6: 0.00000
 DEAL::
 DEAL::no. cells: 510
-DEAL::Diff prolongate   l1: 2.85840e-07
-DEAL::Diff prolongate   l2: 6.99005e-07
-DEAL::Diff prolongate   l3: 6.37051e-07
-DEAL::Diff prolongate   l4: 6.49375e-07
-DEAL::Diff prolongate   l5: 8.03533e-07
-DEAL::Diff restrict     l1: 1.19518e-06
-DEAL::Diff restrict add l1: 1.30982e-06
-DEAL::Diff restrict     l2: 2.03789e-06
-DEAL::Diff restrict add l2: 2.37529e-06
-DEAL::Diff restrict     l3: 1.73984e-06
-DEAL::Diff restrict add l3: 2.04626e-06
-DEAL::Diff restrict     l4: 2.27244e-06
-DEAL::Diff restrict add l4: 2.68893e-06
-DEAL::Diff restrict     l5: 2.50819e-06
-DEAL::Diff restrict add l5: 2.81610e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::FE: FE_DGQ<3>(2)
 DEAL::no. cells: 15
-DEAL::Diff prolongate   l1: 3.59899e-07
-DEAL::Diff prolongate   l2: 2.87715e-07
-DEAL::Diff restrict     l1: 1.42897e-06
-DEAL::Diff restrict add l1: 1.63752e-06
-DEAL::Diff restrict     l2: 1.23597e-06
-DEAL::Diff restrict add l2: 1.64779e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
 DEAL::
 DEAL::no. cells: 694
-DEAL::Diff prolongate   l1: 2.21408e-07
-DEAL::Diff prolongate   l2: 8.88202e-07
-DEAL::Diff prolongate   l3: 1.52178e-06
-DEAL::Diff prolongate   l4: 2.01890e-06
-DEAL::Diff prolongate   l5: 2.01186e-06
-DEAL::Diff restrict     l1: 1.68129e-06
-DEAL::Diff restrict add l1: 1.72600e-06
-DEAL::Diff restrict     l2: 4.82686e-06
-DEAL::Diff restrict add l2: 4.96640e-06
-DEAL::Diff restrict     l3: 7.12362e-06
-DEAL::Diff restrict add l3: 7.57417e-06
-DEAL::Diff restrict     l4: 8.57089e-06
-DEAL::Diff restrict add l4: 9.27497e-06
-DEAL::Diff restrict     l5: 8.82054e-06
-DEAL::Diff restrict add l5: 9.29884e-06
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff prolongate   l5: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
+DEAL::Diff restrict     l5: 0.00000
+DEAL::Diff restrict add l5: 0.00000
 DEAL::
 DEAL::no. cells: 1791
-DEAL::Diff prolongate   l1: 1.83067e-06
-DEAL::Diff prolongate   l2: 1.76217e-06
-DEAL::Diff prolongate   l3: 2.90233e-06
-DEAL::Diff prolongate   l4: 3.65006e-06
-DEAL::Diff restrict     l1: 7.62144e-06
-DEAL::Diff restrict add l1: 7.96738e-06
-DEAL::Diff restrict     l2: 6.90848e-06
-DEAL::Diff restrict add l2: 7.61657e-06
-DEAL::Diff restrict     l3: 1.27095e-05
-DEAL::Diff restrict add l3: 1.36699e-05
-DEAL::Diff restrict     l4: 1.63296e-05
-DEAL::Diff restrict add l4: 1.74402e-05
+DEAL::Diff prolongate   l1: 0.00000
+DEAL::Diff prolongate   l2: 0.00000
+DEAL::Diff prolongate   l3: 0.00000
+DEAL::Diff prolongate   l4: 0.00000
+DEAL::Diff restrict     l1: 0.00000
+DEAL::Diff restrict add l1: 0.00000
+DEAL::Diff restrict     l2: 0.00000
+DEAL::Diff restrict add l2: 0.00000
+DEAL::Diff restrict     l3: 0.00000
+DEAL::Diff restrict add l3: 0.00000
+DEAL::Diff restrict     l4: 0.00000
+DEAL::Diff restrict add l4: 0.00000
 DEAL::