From: raphael couturier <couturie@extinction>
Date: Sat, 11 Oct 2014 12:28:15 +0000 (+0200)
Subject: new
X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/GMRES2stage.git/commitdiff_plain/96dcb243cd0224275446d6d85fab46ed72241a22?ds=sidebyside

new
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diff --git a/paper.tex b/paper.tex
index b294efc..9035059 100644
--- a/paper.tex
+++ b/paper.tex
@@ -931,8 +931,16 @@ by core. The Juqueen architecture is composed  of IBM PowerPC A2 at 1.6 GHz with
 speed network.
 
 
+In  many situations, using  preconditioners is  essential in  order to  find the
+solution of a linear system.  There are many preconditioners available in PETSc.
+For parallel applications all  the preconditioners based on matrix factorization
+are  not  available. In  our  experiments, we  have  tested  different kinds  of
+preconditioners, however  as it is  not the subject  of this paper, we  will not
+present results with many preconditioners. In  practise, we have chosen to use a
+multigrid (mg)  and successive  over-relaxation (sor). For  more details  on the
+preconditioner in PETSc please consult~\cite{petsc-web-page}.
+
 
-{\bf Description of preconditioners}\\
 
 \begin{table*}[htbp]
 \begin{center}