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<A NAME="PCLUSetDamping"><H1>PCLUSetDamping</H1></A>
adds this quantity to the diagonal of the matrix during the LU numerical factorization
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
int PCLUSetDamping(PC pc,PetscReal damping)
</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>damping </B></TD><TD>- amount of damping (use <A HREF="../Sys/PETSC_DECIDE.html#PETSC_DECIDE">PETSC_DECIDE</A> for default of 1.e-12)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
<DT><B>-pc_lu_damping <damping> </B> -Sets damping amount or <A HREF="../Sys/PETSC_DECIDE.html#PETSC_DECIDE">PETSC_DECIDE</A> for the default
<br>
<P>
Note: If 0.0 is given, then no damping is used. If a diagonal element is classified as a zero
pivot, then the damping is doubled until this is alleviated.
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../PC/PC.html#PC">PC</A>, set, factorization, direct, fill
<BR>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCILUSetFill.html#PCILUSetFill">PCILUSetFill</A>(), PCILUSetDamp()
<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/lu/lu.c.html#PCLUSetDamping">src/ksp/pc/impls/lu/lu.c</A>
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