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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</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-3.10.3 v3.10.3 docs/manualpages/PC/PCMGSetGalerkin.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PCMGSetGalerkin"><H1>PCMGSetGalerkin</H1></A>
Causes the coarser grid matrices to be computed from the finest grid via the Galerkin process: A_i-1 = r_i * A_i * p_i
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscksp.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../PC/PCMGSetGalerkin.html#PCMGSetGalerkin">PCMGSetGalerkin</A>(<A HREF="../PC/PC.html#PC">PC</A> pc,PCMGGalerkinType use)
</PRE>
Logically Collective on <A HREF="../PC/PC.html#PC">PC</A>
<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>pc </B></TD><TD>- the multigrid context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>use </B></TD><TD>- one of <A HREF="../PC/PCMGalerkinType.html#PCMGalerkinType">PC_MG_GALERKIN_BOTH</A>,<A HREF="../PC/PCMGalerkinType.html#PCMGalerkinType">PC_MG_GALERKIN_PMAT</A>,<A HREF="../PC/PCMGalerkinType.html#PCMGalerkinType">PC_MG_GALERKIN_MAT</A>, or <A HREF="../PC/PCMGalerkinType.html#PCMGalerkinType">PC_MG_GALERKIN_NONE</A>
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
<DT><B>-pc_mg_galerkin <both,pmat,mat,none></B> -
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Some codes that use <A HREF="../PC/PCMG.html#PCMG">PCMG</A> such as <A HREF="../PC/PCGAMG.html#PCGAMG">PCGAMG</A> use Galerkin internally while constructing the hierarchy and thus do not
use the <A HREF="../PC/PCMG.html#PCMG">PCMG</A> construction of the coarser grids.
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
MG, set, Galerkin
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCMGGetGalerkin.html#PCMGGetGalerkin">PCMGGetGalerkin</A>(), PCMGGalerkinType
<BR>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/ksp/pc/impls/mg/mg.c.html#PCMGSetGalerkin">src/ksp/pc/impls/mg/mg.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex42.c.html">src/ksp/ksp/examples/tutorials/ex42.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex70.c.html">src/ksp/ksp/examples/tutorials/ex70.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/ksp/pc/impls/mg/mg.c.html#PCMGSetGalerkin_MG">PCMGSetGalerkin_MG in src/ksp/pc/impls/mg/mg.c</A><BR>
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