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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="PCASMCreateSubdomains2D"><H1>PCASMCreateSubdomains2D</H1></A>
Creates the index sets for the overlapping Schwarz preconditioner for a two-dimensional problem on a regular grid.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
PetscErrorCode PCASMCreateSubdomains2D(PetscInt m,PetscInt n,PetscInt M,PetscInt N,PetscInt dof,PetscInt overlap,PetscInt *Nsub,IS **is,IS **is_local)
</PRE>
Not 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>m, n </B></TD><TD>- the number of mesh points in the x and y directions
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>M, N </B></TD><TD>- the number of subdomains in the x and y directions
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dof </B></TD><TD>- degrees of freedom per node
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>overlap </B></TD><TD>- overlap in mesh lines
</TD></TR></TABLE>
<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>Nsub </B></TD><TD>- the number of subdomains created
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>is </B></TD><TD>- array of index sets defining overlapping (if overlap > 0) subdomains
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>is_local </B></TD><TD>- array of index sets defining non-overlapping subdomains
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Note</FONT></H3>
Presently PCAMSCreateSubdomains2d() is valid only for sequential
preconditioners. More general related routines are
<A HREF="../PC/PCASMSetTotalSubdomains.html#PCASMSetTotalSubdomains">PCASMSetTotalSubdomains</A>() and <A HREF="../PC/PCASMSetLocalSubdomains.html#PCASMSetLocalSubdomains">PCASMSetLocalSubdomains</A>().
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../PC/PC.html#PC">PC</A>, ASM, additive Schwarz, create, subdomains, 2D, regular grid
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCASMSetTotalSubdomains.html#PCASMSetTotalSubdomains">PCASMSetTotalSubdomains</A>(), <A HREF="../PC/PCASMSetLocalSubdomains.html#PCASMSetLocalSubdomains">PCASMSetLocalSubdomains</A>(), <A HREF="../PC/PCASMGetSubKSP.html#PCASMGetSubKSP">PCASMGetSubKSP</A>(),
<BR><A HREF="../PC/PCASMSetOverlap.html#PCASMSetOverlap">PCASMSetOverlap</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/asm/asm.c.html#PCASMCreateSubdomains2D">src/ksp/pc/impls/asm/asm.c</A>
<BR><A HREF="./index.html">Index of all PC routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex8.c.html">src/ksp/ksp/examples/tutorials/ex8.c.html</A><BR>
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