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<TITLE>PCGAMGSetReuseInterpolation</TITLE>
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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
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<A NAME="PCGAMGSetReuseInterpolation"><H1>PCGAMGSetReuseInterpolation</H1></A>
Reuse prolongation when rebuilding algebraic multigrid preconditioner
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
#include "petscksp.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../PC/PCGAMGSetReuseInterpolation.html#PCGAMGSetReuseInterpolation">PCGAMGSetReuseInterpolation</A>(<A HREF="../PC/PC.html#PC">PC</A> pc, <A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> n)
</PRE>
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 preconditioner context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> or <A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A>
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_gamg_reuse_interpolation <true,false></B></TD></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
this may negatively affect the convergence rate of the method on new matrices if the matrix entries change a great deal, but allows
rebuilding the preconditioner quicker.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
()
<BR><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/gamg/gamg.c.html#PCGAMGSetReuseInterpolation">src/ksp/pc/impls/gamg/gamg.c</A>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/ksp/pc/impls/gamg/gamg.c.html#PCGAMGSetReuseInterpolation_GAMG">PCGAMGSetReuseInterpolation_GAMG in src/ksp/pc/impls/gamg/gamg.c</A><BR>
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