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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/PCGASMCreateSubdomains2D.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PCGASMCreateSubdomains2D"><H1>PCGASMCreateSubdomains2D</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 PCGASMCreateSubdomains2D(PC pc,PetscInt M,PetscInt N,PetscInt Mdomains,PetscInt Ndomains,PetscInt dof,PetscInt overlap,PetscInt *nsub,IS **iis,IS **ois)
</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>M, N </B></TD><TD>- the global number of grid points in the x and y directions
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>Mdomains, Ndomains </B></TD><TD>- the global 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 local subdomains created
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>iis </B></TD><TD>- array of index sets defining inner (nonoverlapping) subdomains
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ois </B></TD><TD>- array of index sets defining outer (overlapping, if overlap > 0) subdomains
</TD></TR></TABLE>
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../PC/PC.html#PC">PC</A>, GASM, additive Schwarz, create, subdomains, 2D, regular grid
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCGASMSetSubdomains.html#PCGASMSetSubdomains">PCGASMSetSubdomains</A>(), <A HREF="../PC/PCGASMGetSubKSP.html#PCGASMGetSubKSP">PCGASMGetSubKSP</A>(), <A HREF="../PC/PCGASMSetOverlap.html#PCGASMSetOverlap">PCGASMSetOverlap</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/gasm/gasm.c.html#PCGASMCreateSubdomains2D">src/ksp/pc/impls/gasm/gasm.c</A>
<BR><A HREF="./index.html">Index of all PC routines</A>
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<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex62.c.html">src/ksp/ksp/examples/tutorials/ex62.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex64.c.html">src/ksp/ksp/examples/tutorials/ex64.c.html</A><BR>
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