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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="PCHYPRESetDiscreteGradient"><H1>PCHYPRESetDiscreteGradient</H1></A>
Set discrete gradient matrix
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
PetscErrorCode PCHYPRESetDiscreteGradient(PC pc, Mat G)
</PRE>
Collective on <A HREF="../PC/PC.html#PC">PC</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>pc </B></TD><TD>- the preconditioning context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>G </B></TD><TD>- the discrete gradient
</TD></TR></TABLE>
<P>
<P>
Notes: G should have as many rows as the number of edges and as many columns as the number of vertices in the mesh
Each row of G has 2 nonzeros, with column indexes being the global indexes of edge's endpoints: matrix entries are +1 and -1 depending on edge orientation
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/hypre/hypre.c.html#PCHYPRESetDiscreteGradient">src/ksp/pc/impls/hypre/hypre.c</A>
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