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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
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<A NAME="MatLUFactorSymbolic"><H1>MatLUFactorSymbolic</H1></A>
Performs symbolic LU factorization of matrix. Call this routine before calling <A HREF="../Mat/MatLUFactorNumeric.html#MatLUFactorNumeric">MatLUFactorNumeric</A>().
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatLUFactorSymbolic.html#MatLUFactorSymbolic">MatLUFactorSymbolic</A>(<A HREF="../Mat/Mat.html#Mat">Mat</A> fact,<A HREF="../Mat/Mat.html#Mat">Mat</A> mat,<A HREF="../IS/IS.html#IS">IS</A> row,<A HREF="../IS/IS.html#IS">IS</A> col,const <A HREF="../Mat/MatFactorInfo.html#MatFactorInfo">MatFactorInfo</A> *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>row, col </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>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
See Users-Manual: ch_mat for additional information about choosing the fill factor for better efficiency.
<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>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatLUFactor.html#MatLUFactor">MatLUFactor</A>(), <A HREF="../Mat/MatLUFactorNumeric.html#MatLUFactorNumeric">MatLUFactorNumeric</A>(), <A HREF="../Mat/MatCholeskyFactor.html#MatCholeskyFactor">MatCholeskyFactor</A>(), <A HREF="../Mat/MatFactorInfo.html#MatFactorInfo">MatFactorInfo</A>, <A HREF="../Mat/MatFactorInfoInitialize.html#MatFactorInfoInitialize">MatFactorInfoInitialize</A>()
<BR>
<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></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/mat/interface/matrix.c.html#MatLUFactorSymbolic">src/mat/interface/matrix.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/mat/impls/aij/mpi/mkl_cpardiso/mkl_cpardiso.c.html#MatLUFactorSymbolic_AIJMKL_CPARDISO">MatLUFactorSymbolic_AIJMKL_CPARDISO in src/mat/impls/aij/mpi/mkl_cpardiso/mkl_cpardiso.c</A><BR>
<A HREF="../../../src/mat/impls/aij/mpi/mumps/mumps.c.html#MatLUFactorSymbolic_AIJMUMPS">MatLUFactorSymbolic_AIJMUMPS in src/mat/impls/aij/mpi/mumps/mumps.c</A><BR>
<A HREF="../../../src/mat/impls/aij/mpi/mumps/mumps.c.html#MatLUFactorSymbolic_BAIJMUMPS">MatLUFactorSymbolic_BAIJMUMPS in src/mat/impls/aij/mpi/mumps/mumps.c</A><BR>
<A HREF="../../../src/mat/impls/aij/mpi/pastix/pastix.c.html#MatLUFactorSymbolic_AIJPASTIX">MatLUFactorSymbolic_AIJPASTIX in src/mat/impls/aij/mpi/pastix/pastix.c</A><BR>
<A HREF="../../../src/mat/impls/aij/mpi/strumpack/strumpack.c.html#MatLUFactorSymbolic_STRUMPACK">MatLUFactorSymbolic_STRUMPACK in src/mat/impls/aij/mpi/strumpack/strumpack.c</A><BR>
<A HREF="../../../src/mat/impls/aij/mpi/superlu_dist/superlu_dist.c.html#MatLUFactorSymbolic_SuperLU_DIST">MatLUFactorSymbolic_SuperLU_DIST in src/mat/impls/aij/mpi/superlu_dist/superlu_dist.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/aijfact.c.html#MatLUFactorSymbolic_SeqAIJ_inplace">MatLUFactorSymbolic_SeqAIJ_inplace in src/mat/impls/aij/seq/aijfact.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/aijfact.c.html#MatLUFactorSymbolic_SeqAIJ">MatLUFactorSymbolic_SeqAIJ in src/mat/impls/aij/seq/aijfact.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/essl/essl.c.html#MatLUFactorSymbolic_Essl">MatLUFactorSymbolic_Essl in src/mat/impls/aij/seq/essl/essl.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/klu/klu.c.html#MatLUFactorSymbolic_KLU">MatLUFactorSymbolic_KLU in src/mat/impls/aij/seq/klu/klu.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/lusol/lusol.c.html#MatLUFactorSymbolic_LUSOL">MatLUFactorSymbolic_LUSOL in src/mat/impls/aij/seq/lusol/lusol.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/matlab/aijmatlab.c.html#MatLUFactorSymbolic_Matlab">MatLUFactorSymbolic_Matlab in src/mat/impls/aij/seq/matlab/aijmatlab.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/mkl_pardiso/mkl_pardiso.c.html#MatLUFactorSymbolic_AIJMKL_PARDISO">MatLUFactorSymbolic_AIJMKL_PARDISO in src/mat/impls/aij/seq/mkl_pardiso/mkl_pardiso.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/seqcusparse/aijcusparse.cu.html#MatLUFactorSymbolic_SeqAIJCUSPARSE">MatLUFactorSymbolic_SeqAIJCUSPARSE in src/mat/impls/aij/seq/seqcusparse/aijcusparse.cu</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/superlu/superlu.c.html#MatLUFactorSymbolic_SuperLU">MatLUFactorSymbolic_SuperLU in src/mat/impls/aij/seq/superlu/superlu.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/umfpack/umfpack.c.html#MatLUFactorSymbolic_UMFPACK">MatLUFactorSymbolic_UMFPACK in src/mat/impls/aij/seq/umfpack/umfpack.c</A><BR>
<A HREF="../../../src/mat/impls/baij/seq/baijfact3.c.html#MatLUFactorSymbolic_SeqBAIJ">MatLUFactorSymbolic_SeqBAIJ in src/mat/impls/baij/seq/baijfact3.c</A><BR>
<A HREF="../../../src/mat/impls/baij/seq/baijfact3.c.html#MatLUFactorSymbolic_SeqBAIJ_inplace">MatLUFactorSymbolic_SeqBAIJ_inplace in src/mat/impls/baij/seq/baijfact3.c</A><BR>
<A HREF="../../../src/mat/impls/dense/seq/dense.c.html#MatLUFactorSymbolic_SeqDense">MatLUFactorSymbolic_SeqDense in src/mat/impls/dense/seq/dense.c</A><BR>
<A HREF="../../../src/mat/impls/elemental/matelem.cxx.html#MatLUFactorSymbolic_Elemental">MatLUFactorSymbolic_Elemental in src/mat/impls/elemental/matelem.cxx</A><BR>
<A HREF="../../../src/mat/impls/scalapack/matscalapack.c.html#MatLUFactorSymbolic_ScaLAPACK">MatLUFactorSymbolic_ScaLAPACK in src/mat/impls/scalapack/matscalapack.c</A><BR>
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