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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="PCGASMGetSubdomains"><H1>PCGASMGetSubdomains</H1></A>
Gets the subdomains supported on this processor for the additive Schwarz preconditioner.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
PetscErrorCode PCGASMGetSubdomains(PC pc,PetscInt *n,IS *iis[],IS *ois[])
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>pc </B> -the preconditioner context
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- the number of subdomains for this processor (default value = 1)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>iis </B></TD><TD>- the index sets that define the inner subdomains (without overlap) supported on this processor (can be NULL)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ois </B></TD><TD>- the index sets that define the outer subdomains (with overlap) supported on this processor (can be NULL)
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The user is responsible for destroying the ISs and freeing the returned arrays.
The <A HREF="../IS/IS.html#IS">IS</A> numbering is in the parallel, global numbering of the vector.
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../PC/PC.html#PC">PC</A>, GASM, get, subdomains, additive Schwarz
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCGASMSetOverlap.html#PCGASMSetOverlap">PCGASMSetOverlap</A>(), <A HREF="../PC/PCGASMGetSubKSP.html#PCGASMGetSubKSP">PCGASMGetSubKSP</A>(), <A HREF="../PC/PCGASMCreateSubdomains2D.html#PCGASMCreateSubdomains2D">PCGASMCreateSubdomains2D</A>(),
<BR><A HREF="../PC/PCGASMSetSubdomains.html#PCGASMSetSubdomains">PCGASMSetSubdomains</A>(), <A HREF="../PC/PCGASMGetSubmatrices.html#PCGASMGetSubmatrices">PCGASMGetSubmatrices</A>()
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/gasm/gasm.c.html#PCGASMGetSubdomains">src/ksp/pc/impls/gasm/gasm.c</A>
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