]> https://gitweb.dealii.org/ - dealii-svn.git/commitdiff
New SolverGMRES::AdditionalData::use_default_residual flag.
authorhartmann <hartmann@0785d39b-7218-0410-832d-ea1e28bc413d>
Fri, 31 Jan 2003 13:16:15 +0000 (13:16 +0000)
committerhartmann <hartmann@0785d39b-7218-0410-832d-ea1e28bc413d>
Fri, 31 Jan 2003 13:16:15 +0000 (13:16 +0000)
git-svn-id: https://svn.dealii.org/trunk@7000 0785d39b-7218-0410-832d-ea1e28bc413d

deal.II/doc/news/2002/c-3-4.html

index cac7ae3e77ec0874c4367983cf1796911d723fa9..0798c328ad4f14279c30b340d0f7ca863420d252 100644 (file)
@@ -492,6 +492,19 @@ contributor's names are abbreviated by WB (Wolfgang Bangerth), GK
 
 <ol>
 
+  <li> <p> New: The <code class="class">SolverGMRES</code> now accepts
+  an <code class="class">AdditionalData</code> parameter
+  <code>use_default_residual</code> whose default is
+  <code>true</code>. By setting this flag to <code>false</code>, the
+  stopping criterion of the left-preconditioned GMRes solver is not
+  the default preconditioned residual but the normal (unpreconditioned)
+  residual and visa versa for the right-preconditioned GMRes
+  solver. Due to a performance loss of the solver this flag should
+  be set to <code>false</code> only for debugging/testing purposes.
+  <br>
+  (RH 2003/01/31)
+  </p>
+
   <li> <p> New: <code class="class">FullMatrix</code> has a
   function <code class="member">copy_from</code>, copying from sparse matrices.
   It uses iterators of the sparse matrix classes.

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