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
45
46
47
48
49
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD>
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>KSPSetDiagonalScaleFix</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<A NAME="KSPSetDiagonalScaleFix"><H1>KSPSetDiagonalScaleFix</H1></A>
Tells <A HREF="../KSP/KSP.html#KSP">KSP</A> to diagonally scale the system back after solving.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscksp.h"
PetscErrorCode PETSCKSP_DLLEXPORT KSPSetDiagonalScaleFix(KSP ksp,PetscTruth fix)
</PRE>
Collective on <A HREF="../KSP/KSP.html#KSP">KSP</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ksp </B></TD><TD>- the <A HREF="../KSP/KSP.html#KSP">KSP</A> context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fix </B></TD><TD>- <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> to scale back after the system solve, <A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A> to not
rescale (default)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Must be called after <A HREF="../KSP/KSPSetDiagonalScale.html#KSPSetDiagonalScale">KSPSetDiagonalScale</A>()
<P>
Using this will slow things down, because it rescales the matrix before and
after each linear solve. This is intended mainly for testing to allow one
to easily get back the original system to make sure the solution computed is
accurate enough.
<P>
This routine is only used if the matrix and preconditioner matrix are
the same thing.
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../KSP/KSP.html#KSP">KSP</A>, set, options, prefix, database
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../KSP/KSPGetDiagonalScale.html#KSPGetDiagonalScale">KSPGetDiagonalScale</A>(), <A HREF="../KSP/KSPSetDiagonalScale.html#KSPSetDiagonalScale">KSPSetDiagonalScale</A>(), <A HREF="../KSP/KSPGetDiagonalScaleFix.html#KSPGetDiagonalScaleFix">KSPGetDiagonalScaleFix</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/ksp/interface/itfunc.c.html#KSPSetDiagonalScaleFix">src/ksp/ksp/interface/itfunc.c</A>
<BR><A HREF="./index.html">Index of all KSP 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>
|
