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<TITLE>PCGASMSetUseDMSubdomains</TITLE>
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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</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-3.7.5 v3.7.5 docs/manualpages/PC/PCGASMSetUseDMSubdomains.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PCGASMSetUseDMSubdomains"><H1>PCGASMSetUseDMSubdomains</H1></A>
Indicates whether to use <A HREF="../DM/DMCreateDomainDecomposition.html#DMCreateDomainDecomposition">DMCreateDomainDecomposition</A>() to define the subdomains, whenever possible. Logically Collective
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
PetscErrorCode PCGASMSetUseDMSubdomains(PC pc,PetscBool flg)
</PRE>
<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>pc </B></TD><TD>- the preconditioner
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>flg </B></TD><TD>- boolean indicating whether to use subdomains defined by the <A HREF="../DM/DM.html#DM">DM</A>
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
<DT><B>-pc_gasm_dm_subdomains </B> -pc_gasm_overlap -pc_gasm_total_subdomains
<br>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
<A HREF="../PC/PCGASMSetSubdomains.html#PCGASMSetSubdomains">PCGASMSetSubdomains</A>(), <A HREF="../PC/PCGASMSetTotalSubdomains.html#PCGASMSetTotalSubdomains">PCGASMSetTotalSubdomains</A>() or <A HREF="../PC/PCGASMSetOverlap.html#PCGASMSetOverlap">PCGASMSetOverlap</A>() take precedence over <A HREF="../PC/PCGASMSetUseDMSubdomains.html#PCGASMSetUseDMSubdomains">PCGASMSetUseDMSubdomains</A>(),
so setting <A HREF="../PC/PCGASMSetSubdomains.html#PCGASMSetSubdomains">PCGASMSetSubdomains</A>() with nontrivial subdomain ISs or any of <A HREF="../PC/PCGASMSetTotalSubdomains.html#PCGASMSetTotalSubdomains">PCGASMSetTotalSubdomains</A>() and <A HREF="../PC/PCGASMSetOverlap.html#PCGASMSetOverlap">PCGASMSetOverlap</A>()
automatically turns the latter off.
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../PC/PC.html#PC">PC</A>, ASM, <A HREF="../DM/DM.html#DM">DM</A>, set, subdomains, additive Schwarz
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCGASMGetUseDMSubdomains.html#PCGASMGetUseDMSubdomains">PCGASMGetUseDMSubdomains</A>(), <A HREF="../PC/PCGASMSetSubdomains.html#PCGASMSetSubdomains">PCGASMSetSubdomains</A>(), <A HREF="../PC/PCGASMSetOverlap.html#PCGASMSetOverlap">PCGASMSetOverlap</A>()
<BR><A HREF="../PC/PCGASMCreateSubdomains2D.html#PCGASMCreateSubdomains2D">PCGASMCreateSubdomains2D</A>()
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/gasm/gasm.c.html#PCGASMSetUseDMSubdomains">src/ksp/pc/impls/gasm/gasm.c</A>
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