]> https://gitweb.dealii.org/ - dealii-svn.git/commitdiff
.
authorwolf <wolf@0785d39b-7218-0410-832d-ea1e28bc413d>
Sun, 12 Feb 2006 04:42:12 +0000 (04:42 +0000)
committerwolf <wolf@0785d39b-7218-0410-832d-ea1e28bc413d>
Sun, 12 Feb 2006 04:42:12 +0000 (04:42 +0000)
git-svn-id: https://svn.dealii.org/trunk@12328 0785d39b-7218-0410-832d-ea1e28bc413d

deal.II/doc/tutorial/chapter-2.step-by-step/step-20.data/intro.tex

index f2bc2fc2a37e3a53182d6ddb71cf94b5f6ecf59b..9b89343604671e07587557c3b33a993b293ca894 100644 (file)
@@ -5,9 +5,9 @@
 
 This program is devoted to two aspects: the use of mixed finite elements -- in
 particular Raviart-Thomas elements -- and using block matrices to define
-solvers and preconditioners that use the substructure of the system
-matrix. The equation we are going to solve is again the Laplace equation,
-though with a matrix-valued coefficient:
+solvers, preconditioners, and nested versions of those that use the
+substructure of the system matrix. The equation we are going to solve is again
+the Laplace equation, though with a matrix-valued coefficient:
 \begin{align*}
   -\nabla \cdot K(\vec x) \nabla p &= f \qquad && \text{in $\Omega$}, \\
   p &= g && \text{on $\partial\Omega$}.
@@ -640,13 +640,13 @@ look like this:
     schur_rhs -= system_rhs.block(1);
 
     SchurComplement
-      schur_complement (system_matrix, m_inverse)
+      schur_complement (system_matrix, m_inverse);
     
     ApproximateSchurComplement
       approximate_schur_complement (system_matrix);
       
     InverseMatrix<ApproximateSchurComplement>
-      preconditioner (approximate_schur_complement)
+      preconditioner (approximate_schur_complement);
     
     SolverControl solver_control (system_matrix.block(0,0).m(),
                                   1e-6*schur_rhs.l2_norm());

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