]> https://gitweb.dealii.org/ - dealii-svn.git/commitdiff
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authorbangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Fri, 30 Mar 2007 22:09:07 +0000 (22:09 +0000)
committerbangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Fri, 30 Mar 2007 22:09:07 +0000 (22:09 +0000)
git-svn-id: https://svn.dealii.org/trunk@14611 0785d39b-7218-0410-832d-ea1e28bc413d

deal.II/lac/include/lac/petsc_precondition.h

index 417b9577419bebb23acd77761d4451371628755b..d4a36c3ec044794878e458ac9e19ea7abbe3e529 100644 (file)
@@ -2,7 +2,7 @@
 //    $Id$
 //    Version: $Name$
 //
-//    Copyright (C) 2004, 2005, 2006 by the deal.II authors
+//    Copyright (C) 2004, 2005, 2006, 2007 by the deal.II authors
 //
 //    This file is subject to QPL and may not be  distributed
 //    without copyright and license information. Please refer
@@ -38,9 +38,14 @@ namespace PETScWrappers
  * classes in this hierarchy don't do a whole lot, except for providing a
  * function that sets the preconditioner and certain parameters on the
  * preconditioning context of the solver. These classes are basically here
- * only to allow a similar interface than already used for the deal.II solver
+ * only to allow a similar interface as already used for the deal.II solver
  * and preconditioner classes.
  *
+ * Note that the classes here only provide interfaces to the relevant
+ * functionality of PETSc. PETSc does not implement all preconditioners for
+ * all matrix types. In particular, some preconditioners are not going to work
+ * for parallel jobs, such as for example the ILU preconditioner.
+ *
  * @ingroup PETScWrappers
  * @author Wolfgang Bangerth, 2004
  */

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