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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="MatCholeskyFactorSymbolic"><H1>MatCholeskyFactorSymbolic</H1></A>
Performs symbolic Cholesky factorization of a symmetric matrix.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
PetscErrorCode MatCholeskyFactorSymbolic(Mat fact,Mat mat,IS perm,const MatFactorInfo *info)
</PRE>
Collective on <A HREF="../Mat/Mat.html#Mat">Mat</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>fact </B></TD><TD>- the factor matrix obtained with <A HREF="../Mat/MatGetFactor.html#MatGetFactor">MatGetFactor</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mat </B></TD><TD>- the matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>perm </B></TD><TD>- row and column permutations
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>info </B></TD><TD>- options for factorization, includes
</TD></TR></TABLE>
<pre>
fill - expected fill as ratio of original fill.
</pre>
<pre>
dtcol - pivot tolerance (0 no pivot, 1 full column pivoting)
</pre>
<pre>
Run with the option -info to determine an optimal value to use
</pre>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
See <A HREF="../Mat/MatLUFactorSymbolic.html#MatLUFactorSymbolic">MatLUFactorSymbolic</A>() for the nonsymmetric case. See also
<A HREF="../Mat/MatCholeskyFactor.html#MatCholeskyFactor">MatCholeskyFactor</A>() and <A HREF="../Mat/MatCholeskyFactorNumeric.html#MatCholeskyFactorNumeric">MatCholeskyFactorNumeric</A>().
<P>
Most users should employ the simplified <A HREF="../KSP/KSP.html#KSP">KSP</A> interface for linear solvers
instead of working directly with matrix algebra routines such as this.
See, e.g., <A HREF="../KSP/KSPCreate.html#KSPCreate">KSPCreate</A>().
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatLUFactorSymbolic.html#MatLUFactorSymbolic">MatLUFactorSymbolic</A>(), <A HREF="../Mat/MatCholeskyFactor.html#MatCholeskyFactor">MatCholeskyFactor</A>(), <A HREF="../Mat/MatCholeskyFactorNumeric.html#MatCholeskyFactorNumeric">MatCholeskyFactorNumeric</A>()
<BR><A HREF="../MatOrderings/MatGetOrdering.html#MatGetOrdering">MatGetOrdering</A>()
<P>
Developer Note: fortran interface is not autogenerated as the f90
interface defintion cannot be generated correctly [due to <A HREF="../Mat/MatFactorInfo.html#MatFactorInfo">MatFactorInfo</A>]
<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#MatCholeskyFactorSymbolic">src/mat/interface/matrix.c</A>
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