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<TITLE>GMatMatMultUzawa</TITLE>
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<A NAME="GMatMatMultUzawa"><H1>GMatMatMultUzawa</H1></A>
This function applies B^T A^{-1} B to a vector, which is the Schur complement matrix.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsles.h"
#include "gsolver.h"
int GMatMatMultUzawa(GMat mat, GVec x, GVec y)
</PRE>
<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>mat </B></TD><TD>- The grid matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>x </B></TD><TD>- The input grid vector
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>y </B> -The output grid vector B^T A^{-1} B x
<br>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../GVec/GMatEvaluateOperatorGalerkin.html#GMatEvaluateOperatorGalerkin">GMatEvaluateOperatorGalerkin</A>
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/gsolver/interface/gsles.c.html#GMatMatMultUzawa">src/gsolver/interface/gsles.c</A>
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