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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="MatGetInertia"><H1>MatGetInertia</H1></A>
Gets the inertia from a factored matrix
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatGetInertia.html#MatGetInertia">MatGetInertia</A>(<A HREF="../Mat/Mat.html#Mat">Mat</A> mat,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *nneg,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *nzero,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *npos)
</PRE>
Collective on <A HREF="../Mat/Mat.html#Mat">Mat</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mat </B></TD><TD>- the matrix
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nneg </B></TD><TD>- number of negative eigenvalues
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nzero </B></TD><TD>- number of zero eigenvalues
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>npos </B></TD><TD>- number of positive eigenvalues
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Matrix must have been factored by <A HREF="../Mat/MatCholeskyFactor.html#MatCholeskyFactor">MatCholeskyFactor</A>()
<P>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/mat/interface/matrix.c.html#MatGetInertia">src/mat/interface/matrix.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/mat/impls/aij/mpi/mumps/mumps.c.html#MatGetInertia_SBAIJMUMPS">MatGetInertia_SBAIJMUMPS in src/mat/impls/aij/mpi/mumps/mumps.c</A><BR>
<A HREF="../../../src/mat/impls/aij/mpi/superlu_dist/superlu_dist.c.html#MatGetInertia_SuperLU_DIST">MatGetInertia_SuperLU_DIST in src/mat/impls/aij/mpi/superlu_dist/superlu_dist.c</A><BR>
<A HREF="../../../src/mat/impls/aij/seq/mkl_pardiso/mkl_pardiso.c.html#MatGetInertia_MKL_PARDISO">MatGetInertia_MKL_PARDISO in src/mat/impls/aij/seq/mkl_pardiso/mkl_pardiso.c</A><BR>
<A HREF="../../../src/mat/impls/sbaij/seq/sbaijfact.c.html#MatGetInertia_SeqSBAIJ">MatGetInertia_SeqSBAIJ in src/mat/impls/sbaij/seq/sbaijfact.c</A><BR>
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