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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="DMGetDefaultConstraints"><H1>DMGetDefaultConstraints</H1></A>
Get the <A HREF="../IS/PetscSection.html#PetscSection">PetscSection</A> and <A HREF="../Mat/Mat.html#Mat">Mat</A> the specify the local constraint interpolation. See <A HREF="../DM/DMSetDefaultConstraints.html#DMSetDefaultConstraints">DMSetDefaultConstraints</A>() for a description of the purpose of constraint interpolation.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdm.h"
#include "petscdmlabel.h"
PetscErrorCode DMGetDefaultConstraints(DM dm, PetscSection *section, Mat *mat)
</PRE>
not collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>dm </B> -The <A HREF="../DM/DM.html#DM">DM</A>
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>section </B></TD><TD>- The <A HREF="../IS/PetscSection.html#PetscSection">PetscSection</A> describing the range of the constraint matrix: relates rows of the constraint matrix to dofs of the default section. Returns NULL if there are no local constraints.
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mat </B></TD><TD>- The <A HREF="../Mat/Mat.html#Mat">Mat</A> that interpolates local constraints: its width should be the layout size of the default section. Returns NULL if there are no local constraints.
</TD></TR></TABLE>
<P>
<P>
Note: This gets borrowed references, so the user should not destroy the <A HREF="../IS/PetscSection.html#PetscSection">PetscSection</A> or the <A HREF="../Mat/Mat.html#Mat">Mat</A>.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMSetDefaultConstraints.html#DMSetDefaultConstraints">DMSetDefaultConstraints</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/interface/dm.c.html#DMGetDefaultConstraints">src/dm/interface/dm.c</A>
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