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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="MatIsSymmetric"><H1>MatIsSymmetric</H1></A>
Test whether a matrix is symmetric
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
PetscErrorCode MatIsSymmetric(Mat A,PetscReal tol,PetscBool *flg)
</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>A </B></TD><TD>- the matrix to test
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>tol </B></TD><TD>- difference between value and its transpose less than this amount counts as equal (use 0.0 for exact transpose)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>flg </B> -the result
<br>
<P>
Notes: For real numbers <A HREF="../Mat/MatIsSymmetric.html#MatIsSymmetric">MatIsSymmetric</A>() and <A HREF="../Mat/MatIsHermitian.html#MatIsHermitian">MatIsHermitian</A>() return identical results
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatTranspose.html#MatTranspose">MatTranspose</A>(), <A HREF="../Mat/MatIsTranspose.html#MatIsTranspose">MatIsTranspose</A>(), <A HREF="../Mat/MatIsHermitian.html#MatIsHermitian">MatIsHermitian</A>(), <A HREF="../Mat/MatIsStructurallySymmetric.html#MatIsStructurallySymmetric">MatIsStructurallySymmetric</A>(), <A HREF="../Mat/MatSetOption.html#MatSetOption">MatSetOption</A>(), <A HREF="../Mat/MatIsSymmetricKnown.html#MatIsSymmetricKnown">MatIsSymmetricKnown</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/interface/matrix.c.html#MatIsSymmetric">src/mat/interface/matrix.c</A>
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