From: Martin Steigemann <msteigemann@yahoo.de>
Date: Fri, 26 Oct 2012 16:12:04 +0000 (+0000)
Subject: Interface to PETSc::PreconditionNone and ParaSails Preconditioner from the Hypre... 
X-Git-Tag: v8.0.0~1922
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=78510003c90613e400cbbdf21aed966720615489;p=dealii.git

Interface to PETSc::PreconditionNone and ParaSails Preconditioner from the Hypre Suite

git-svn-id: https://svn.dealii.org/trunk@27209 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/doc/news/changes.h b/deal.II/doc/news/changes.h
index 02a25131b9..a7517ce660 100644
--- a/deal.II/doc/news/changes.h
+++ b/deal.II/doc/news/changes.h
@@ -108,6 +108,18 @@ never working correctly and it is not used.
 
 
 <ol>
+<li> New: Added PETScWrappers::PreconditionParaSails and
+PETScWrappers::PreconditionNone. PETScWrappers::PreconditionParaSails
+implements the interface to use the ParaSails sparse approximate
+inverse preconditioner from the HYPRE suite. ParaSails supports
+parallel distributed computations and can handle nonsymmetric
+and also indefinite problems. PETScWrappers::PreconditionNone
+implements non-preconditioning in PETSc which can be of use
+together with the PETScWrappers::MatrixFree class.
+
+<br>
+(Martin Steigemann, 2012/10/26)
+
 <li> New: Added SparsityTools::distribute_sparsity_pattern() for
 BlockCompressedSimpleSparsityPattern. This allows parallel computations
 with distributed::Triangulation and PETScWrappers::MPI::BlockSparseMatrix.