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   <div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="PCFactorSetColumnPivot"><H1>PCFactorSetColumnPivot</H1></A>
Determines when column pivoting is done during matrix factorization. For PETSc dense matrices column pivoting is always done, for PETSc sparse matrices it is never done. For the MATLAB and SuperLU factorization this is used. 
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h" 
PetscErrorCode  PCFactorSetColumnPivot(PC pc,PetscReal dtcol)
</PRE>
Logically 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>dtcol </B></TD><TD>- 0.0 implies no pivoting, 1.0 complete pivoting (slower, requires more memory but more stable)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
<DT><B>-pc_factor_pivoting &lt;dtcol&gt;</B> -

<br>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
 PCILUSetMatOrdering(), <A HREF="../PC/PCFactorSetPivotInBlocks.html#PCFactorSetPivotInBlocks">PCFactorSetPivotInBlocks</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/factor/factor.c.html#PCFactorSetColumnPivot">src/ksp/pc/impls/factor/factor.c</A>
<BR><A HREF="./index.html">Index of all PC routines</A>
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