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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="PCSPAISetNBSteps"><H1>PCSPAISetNBSteps</H1></A>
set maximum number of improvement steps per row in the SPAI preconditioner
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
PetscErrorCode PCSPAISetNBSteps(PC pc,int nbsteps1)
</PRE>
<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
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- number of steps (default 5)
</TD></TR></TABLE>
<P>
Notes: SPAI constructs to approximation to every column of
the exact inverse of A in a series of improvement
steps. The quality of the approximation is determined
by epsilon. If an approximation achieving an accuracy
of epsilon is not obtained after ns steps, SPAI simply
uses the best approximation constructed so far.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCSPAI.html#PCSPAI">PCSPAI</A>, <A HREF="../PC/PCSetType.html#PCSetType">PCSetType</A>(), <A HREF="../PC/PCSPAISetMaxNew.html#PCSPAISetMaxNew">PCSPAISetMaxNew</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/spai/ispai.c.html#PCSPAISetNBSteps">src/ksp/pc/impls/spai/ispai.c</A>
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