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<A NAME="PCSORSetIterations"><H1>PCSORSetIterations</H1></A>
Sets the number of inner iterations to be used by the SOR preconditioner. The default is 1.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
int PCSORSetIterations(PC pc,int its,int lits)
</PRE>
Collective on <A HREF="../PC/PC.html#PC">PC</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>pc </B></TD><TD>- the preconditioner context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>lits </B></TD><TD>- number of local iterations, smoothings over just variables on processor
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>its </B></TD><TD>- number of parallel iterations to use; each parallel iteration has lits local iterations
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_sor_its <its> </B></TD><TD>- Sets number of iterations
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_sor_lits <lits> </B></TD><TD>- Sets number of local iterations
</TD></TR></TABLE>
<P>
<P>
Notes: When run on one processor the number of smoothings is lits*its
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../PC/PC.html#PC">PC</A>, SOR, SSOR, set, iterations
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCSORSetOmega.html#PCSORSetOmega">PCSORSetOmega</A>(), <A HREF="../PC/PCSORSetSymmetric.html#PCSORSetSymmetric">PCSORSetSymmetric</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sles/pc/impls/sor/sor.c.html#PCSORSetIterations">src/sles/pc/impls/sor/sor.c</A>
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