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
50
51
52
53
54
55
56
57
58
59
60
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD>
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<link rel="stylesheet" href="/slepc/slepc.css" type="text/css">
<TITLE>EPSSetExtraction</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<H1>EPSSetExtraction</H1>
Specifies the type of extraction technique to be employed by the eigensolver.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepceps.h"
PetscErrorCode EPSSetExtraction(EPS eps,EPSExtraction extr)
</PRE>
Logically Collective on <A HREF="../EPS/EPS.html#EPS">EPS</A>
<P>
<H3><FONT COLOR="#883300">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>eps </B></TD><TD> - the eigensolver context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>extr </B></TD><TD> - a known type of extraction
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_ritz </B></TD><TD> - Rayleigh-Ritz extraction
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_harmonic </B></TD><TD> - harmonic Ritz extraction
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_harmonic_relative </B></TD><TD> - harmonic Ritz extraction relative to the eigenvalue
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_harmonic_right </B></TD><TD> - harmonic Ritz extraction for rightmost eigenvalues
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_harmonic_largest </B></TD><TD> - harmonic Ritz extraction for largest magnitude
(without target)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_refined </B></TD><TD> - refined Ritz extraction
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-eps_refined_harmonic </B></TD><TD> - refined harmonic Ritz extraction
</TD></TR></TABLE>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
Not all eigensolvers support all types of extraction. See the SLEPc
Users Manual for details.
<P>
By default, a standard Rayleigh-Ritz extraction is used. Other extractions
may be useful when computing interior eigenvalues.
<P>
Harmonic-type extractions are used in combination with a 'target'.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../EPS/EPSSetTarget.html#EPSSetTarget">EPSSetTarget</A>(), <A HREF="../EPS/EPSGetExtraction.html#EPSGetExtraction">EPSGetExtraction</A>(), <A HREF="../EPS/EPSExtraction.html#EPSExtraction">EPSExtraction</A>
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/eps/interface/opts.c.html#EPSSetExtraction">src/eps/interface/opts.c</A>
<BR><A HREF="./index.html">Index of all EPS 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>
|
