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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/PCASMCreateSubdomains.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PCASMCreateSubdomains"><H1>PCASMCreateSubdomains</H1></A>
Creates the index sets for the overlapping Schwarz preconditioner for a any problem on a general grid.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
PetscErrorCode PCASMCreateSubdomains(Mat A, PetscInt n, IS* outis[])
</PRE>
Collective
<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>A </B></TD><TD>- The global matrix operator
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- the number of local blocks
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>outis </B> -the array of index sets defining the subdomains
<br>
<P>
<P>
Note: this generates nonoverlapping subdomains; the <A HREF="../PC/PCASM.html#PCASM">PCASM</A> will generate the overlap
from these if you use <A HREF="../PC/PCASMSetLocalSubdomains.html#PCASMSetLocalSubdomains">PCASMSetLocalSubdomains</A>()
<P>
In the Fortran version you must provide the array outis[] already allocated of length n.
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../PC/PC.html#PC">PC</A>, ASM, additive Schwarz, create, subdomains, unstructured grid
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCASMSetLocalSubdomains.html#PCASMSetLocalSubdomains">PCASMSetLocalSubdomains</A>(), <A HREF="../PC/PCASMDestroySubdomains.html#PCASMDestroySubdomains">PCASMDestroySubdomains</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/asm/asm.c.html#PCASMCreateSubdomains">src/ksp/pc/impls/asm/asm.c</A>
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