--- /dev/null
+//----------------------------------------------------------------------
+// $Id: umfpack_03.cc 13855 2006-09-08 14:42:11Z heltai $
+// Version: $Name$
+//
+// Copyright (C) 2002, 2003, 2004, 2005, 2006 by the deal.II authors
+//
+// This file is subject to QPL and may not be distributed
+// without copyright and license information. Please refer
+// to the file deal.II/doc/license.html for the text and
+// further information on this license.
+//
+//----------------------------------------------------------------------
+
+// test the umfpack sparse direct solver on a simple 2x2 block matrix
+// that equals the unit matrix
+
+#include "../tests.h"
+#include <iostream>
+#include <fstream>
+#include <cstdlib>
+
+#include <lac/block_sparse_matrix.h>
+#include <lac/block_sparsity_pattern.h>
+#include <lac/vector.h>
+#include <lac/sparse_direct.h>
+
+
+
+template <int dim>
+void test ()
+{
+ std::vector<unsigned int> size (2,2U);
+
+ BlockSparsityPattern b_sparsity_pattern;
+ b_sparsity_pattern.reinit(size.size(),size.size());
+ for (unsigned int k=0; k<size.size();++k)
+ for (unsigned int l=0; l<size.size();++l)
+ b_sparsity_pattern.block(k,l).reinit(size[k],
+ size[l],
+ 2);
+ b_sparsity_pattern.collect_sizes();
+ for (unsigned int i=0; i<4; ++i)
+ for (unsigned int j=0; j<4; ++j)
+ b_sparsity_pattern.add (i,j);
+ b_sparsity_pattern.compress();
+
+ BlockSparseMatrix<double> Bb (b_sparsity_pattern);
+ for (unsigned int i=0; i<4; ++i)
+ Bb.add (i,i,1);
+
+ SparseDirectUMFPACK umfpackb;
+ umfpackb.factorize(Bb);
+
+ Vector<double> ubb(4);
+ for (unsigned int i=0; i<4; ++i)
+ ubb(i) = i;
+
+ umfpackb.solve(ubb);
+}
+
+
+int main ()
+{
+ std::ofstream logfile("umfpack_05/output");
+ deallog.attach(logfile);
+ deallog.depth_console(0);
+ deallog.threshold_double(1.e-10);
+
+ test<1> ();
+ test<2> ();
+ test<3> ();
+}
--- /dev/null
+
+DEAL::1d
+DEAL::Number of dofs = 97
+DEAL:cg::Starting value 0.215517
+DEAL:cg::Convergence step 111 value 0
+DEAL:cg::Starting value 0.215517
+DEAL:cg::Convergence step 111 value 0
+DEAL::Sparse Factorization
+DEAL::absolute norms = 6.45748 6.45748
+DEAL::relative norm distance = 0
+DEAL::Block Sparse Factorization
+DEAL::absolute norms = 6.45748 6.45748
+DEAL::relative norm distance = 0
+DEAL::2d
+DEAL::Number of dofs = 994
+DEAL:cg::Starting value 0.595296
+DEAL:cg::Convergence step 58 value 0
+DEAL:cg::Starting value 0.595296
+DEAL:cg::Convergence step 58 value 0
+DEAL::Sparse Factorization
+DEAL::absolute norms = 10.0596 10.0596
+DEAL::relative norm distance = 0
+DEAL::Block Sparse Factorization
+DEAL::absolute norms = 10.0596 10.0596
+DEAL::relative norm distance = 0
+DEAL::3d
+DEAL::Number of dofs = 669
+DEAL:cg::Starting value 3.12141
+DEAL:cg::Convergence step 24 value 0
+DEAL:cg::Starting value 3.12141
+DEAL:cg::Convergence step 24 value 0
+DEAL::Sparse Factorization
+DEAL::absolute norms = 13.7931 13.7931
+DEAL::relative norm distance = 0
+DEAL::Block Sparse Factorization
+DEAL::absolute norms = 13.7931 13.7931
+DEAL::relative norm distance = 0