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
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD> <link rel="canonical" href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/SNES/SNESNGMRESSetRestartFmRise.html" />
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>SNESNGMRESSetRestartFmRise</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.7.5 v3.7.5 docs/manualpages/SNES/SNESNGMRESSetRestartFmRise.html "><small>Report Typos and Errors</small></a></div>
<A NAME="SNESNGMRESSetRestartFmRise"><H1>SNESNGMRESSetRestartFmRise</H1></A>
Increase the restart count if the step x_M increases the residual F_M
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsnes.h"
PetscErrorCode SNESNGMRESSetRestartFmRise(SNES snes,PetscBool flg)
</PRE>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
+ snes - the <A HREF="../SNES/SNES.html#SNES">SNES</A> context.
- flg - boolean value deciding whether to use the option or not
<P>
<H3><FONT COLOR="#CC3333">Options Database</FONT></H3>
+ -snes_ngmres_restart_fm_rise - Increase the restart count if the step x_M increases the residual F_M
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
If the proposed step x_M increases the residual F_M, it might be trying to get out of a stagnation area.
To help the solver do that, reset the Krylov subspace whenever F_M increases.
<P>
This option must be used with SNES_NGMRES_RESTART_DIFFERENCE
<P>
The default is FALSE.
.seealso: SNES_NGMRES_RESTART_DIFFERENCE
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/snes/impls/ngmres/snesngmres.c.html#SNESNGMRESSetRestartFmRise">src/snes/impls/ngmres/snesngmres.c</A>
<BR><A HREF="./index.html">Index of all SNES 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>
|
