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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.14.5 v3.14.5 docs/manualpages/DM/DMCoarsen.html "><small>Report Typos and Errors</small></a></div>
<A NAME="DMCoarsen"><H1>DMCoarsen</H1></A>
Coarsens a <A HREF="../DM/DM.html#DM">DM</A> object
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DM/DMCoarsen.html#DMCoarsen">DMCoarsen</A>(<A HREF="../DM/DM.html#DM">DM</A> dm, <A HREF="../Sys/MPI_Comm.html#MPI_Comm">MPI_Comm</A> comm, <A HREF="../DM/DM.html#DM">DM</A> *dmc)
</PRE>
Collective on dm
<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>dm </B></TD><TD>- the <A HREF="../DM/DM.html#DM">DM</A> object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>comm </B></TD><TD>- the communicator to contain the new <A HREF="../DM/DM.html#DM">DM</A> object (or MPI_COMM_NULL)
</TD></TR></TABLE>
<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>dmc </B></TD><TD>- the coarsened <A HREF="../DM/DM.html#DM">DM</A>
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMRefine.html#DMRefine">DMRefine</A>(), <A HREF="../DM/DMDestroy.html#DMDestroy">DMDestroy</A>(), <A HREF="../DM/DMView.html#DMView">DMView</A>(), <A HREF="../DM/DMCreateGlobalVector.html#DMCreateGlobalVector">DMCreateGlobalVector</A>(), <A HREF="../DM/DMCreateInterpolation.html#DMCreateInterpolation">DMCreateInterpolation</A>()
<BR>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/dm/interface/dm.c.html#DMCoarsen">src/dm/interface/dm.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/ksp/ksp/tutorials/ex65.c.html">src/ksp/ksp/tutorials/ex65.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/dm/impls/composite/pack.c.html#DMCoarsen_Composite">DMCoarsen_Composite in src/dm/impls/composite/pack.c</A><BR>
<A HREF="../../../src/dm/impls/da/da.c.html#DMCoarsen_DA">DMCoarsen_DA in src/dm/impls/da/da.c</A><BR>
<A HREF="../../../src/dm/impls/forest/forest.c.html#DMCoarsen_Forest">DMCoarsen_Forest in src/dm/impls/forest/forest.c</A><BR>
<A HREF="../../../src/dm/impls/moab/dmmbmg.cxx.html#DMCoarsen_Moab">DMCoarsen_Moab in src/dm/impls/moab/dmmbmg.cxx</A><BR>
<A HREF="../../../src/dm/impls/plex/plexcoarsen.c.html#DMCoarsen_Plex">DMCoarsen_Plex in src/dm/impls/plex/plexcoarsen.c</A><BR>
<A HREF="../../../src/dm/impls/redundant/dmredundant.c.html#DMCoarsen_Redundant">DMCoarsen_Redundant in src/dm/impls/redundant/dmredundant.c</A><BR>
<A HREF="../../../src/snes/impls/vi/rs/virs.c.html#DMCoarsen_SNESVI">DMCoarsen_SNESVI in src/snes/impls/vi/rs/virs.c</A><BR>
<BR><A HREF="./index.html">Index of all DM routines</A>
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