From ab0e7cb3e881a3239542dd651de4b9b8c2778c67 Mon Sep 17 00:00:00 2001 From: bangerth Date: Tue, 23 Mar 2010 07:55:50 +0000 Subject: [PATCH] Add a couple comments. git-svn-id: https://svn.dealii.org/trunk@20886 0785d39b-7218-0410-832d-ea1e28bc413d --- deal.II/lac/include/lac/constraint_matrix.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/deal.II/lac/include/lac/constraint_matrix.h b/deal.II/lac/include/lac/constraint_matrix.h index 63d75bff6a..9e745bb0cb 100644 --- a/deal.II/lac/include/lac/constraint_matrix.h +++ b/deal.II/lac/include/lac/constraint_matrix.h @@ -1093,7 +1093,11 @@ class ConstraintMatrix : public Subscriptor * global object, one saves the call to * the condense function after the * vectors and matrices are fully - * assembled. + * assembled. On the other hand, by + * consequence, the function does not + * only write into the entries enumerated + * by the @p local_dof_indices array, but + * also (possibly) others as necessary. * * Note that this function will apply all * constraints as if they were @@ -1149,7 +1153,15 @@ class ConstraintMatrix : public Subscriptor * global object, one saves the call to * the condense function after the * vectors and matrices are fully - * assembled. + * assembled. On the other hand, by + * consequence, the function does not + * only write into the entries enumerated + * by the @p local_dof_indices array, but + * also (possibly) others as + * necessary. This includes writing into + * diagonal elements of the matrix if the + * corresponding degree of freedom is + * constrained. * * The fourth argument * local_matrix is intended to -- 2.39.5