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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="PCBDDCSetCoarseningRatio"><H1>PCBDDCSetCoarseningRatio</H1></A>
Set coarsening ratio used in multilevel
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
PetscErrorCode PCBDDCSetCoarseningRatio(PC pc,PetscInt k)
</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 preconditioning context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>k </B></TD><TD>- coarsening ratio (H/h at the coarser level)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<DT><B>-pc_bddc_coarsening_ratio</B> -
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Approximatively k subdomains at the finer level will be aggregated into a single subdomain at the coarser level
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCBDDC.html#PCBDDC">PCBDDC</A>, <A HREF="../PC/PCBDDCSetLevels.html#PCBDDCSetLevels">PCBDDCSetLevels</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/bddc/bddc.c.html#PCBDDCSetCoarseningRatio">src/ksp/pc/impls/bddc/bddc.c</A>
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