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<A NAME="MatPBRelax"><H1>MatPBRelax</H1></A>
Computes relaxation (SOR, Gauss-Seidel) sweeps.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
int MatPBRelax(Mat mat,Vec b,PetscReal omega,MatSORType flag,PetscReal shift,int its,int lits,Vec x)
</PRE>
Collective on <A HREF="../Mat/Mat.html#Mat">Mat</A> and <A HREF="../Vec/Vec.html#Vec">Vec</A>
<P>
See <A HREF="../Mat/MatRelax.html#MatRelax">MatRelax</A>() for usage
<P>
For multi-component PDEs where the Jacobian is stored in a point block format
(with the PETSc BAIJ matrix formats) the relaxation is done one point block at
a time. That is, the small (for example, 4 by 4) blocks along the diagonal are solved
simultaneously (that is a 4 by 4 linear solve is done) to update all the values at a point.
<P>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/interface/matrix.c.html#MatPBRelax">src/mat/interface/matrix.c</A>
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