1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD>
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>PCILUSetDamping</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<A NAME="PCILUSetDamping"><H1>PCILUSetDamping</H1></A>
adds this quantity to the diagonal of the matrix during the ILU numerical factorization
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
int PCILUSetDamping(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
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
<DT><B>-pc_ilu_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>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCILUSetFill.html#PCILUSetFill">PCILUSetFill</A>(), <A HREF="../PC/PCLUSetDamping.html#PCLUSetDamping">PCLUSetDamping</A>(), <A HREF="../PC/PCILUSetShift.html#PCILUSetShift">PCILUSetShift</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/ilu/ilu.c.html#PCILUSetDamping">src/ksp/pc/impls/ilu/ilu.c</A>
<BR><A HREF="./index.html">Index of all PC routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
</BODY></HTML>
|
