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
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD> <link rel="canonical" href="https://slepc.upv.es/documentation/current//Users/jroman/tmp/slepc-3.23.1/docs/manualpages/sys/VecCheckOrthonormality.html" />
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<link rel="stylesheet" href="/slepc.css" type="text/css">
<TITLE>VecCheckOrthonormality</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<div id="version" align=right><b>slepc-3.23.1 2025-05-01</b></div>
<div id="bugreport" align=right><a href="mailto:slepc-maint@upv.es?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: slepc-3.23.1 v3.23.1 /Users/jroman/tmp/slepc-3.23.1/docs/manualpages/sys/VecCheckOrthonormality.html "><small>Report Typos and Errors</small></a></div>
<H1>VecCheckOrthonormality</H1>
Checks (or prints) the level of (bi-)orthonormality of a set of vectors.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcvec.h"
<A HREF="https://petsc.org/release/manualpages/Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../sys/VecCheckOrthonormality.html#VecCheckOrthonormality">VecCheckOrthonormality</A>(<A HREF="https://petsc.org/release/manualpages/Vec/Vec.html#Vec">Vec</A> V[],<A HREF="https://petsc.org/release/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</A> nv,<A HREF="https://petsc.org/release/manualpages/Vec/Vec.html#Vec">Vec</A> W[],<A HREF="https://petsc.org/release/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</A> nw,<A HREF="https://petsc.org/release/manualpages/Mat/Mat.html#Mat">Mat</A> B,<A HREF="https://petsc.org/release/manualpages/Viewer/PetscViewer.html#PetscViewer">PetscViewer</A> viewer,<A HREF="https://petsc.org/release/manualpages/Sys/PetscReal.html#PetscReal">PetscReal</A> *lev)
</PRE>
Collective
<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>V </B></TD><TD> - a set of vectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nv </B></TD><TD> - number of V vectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>W </B></TD><TD> - an alternative set of vectors (optional)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nw </B></TD><TD> - number of W vectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>B </B></TD><TD> - matrix defining the inner product (optional)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>viewer </B></TD><TD> - optional visualization context
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>lev </B></TD><TD> - level of orthogonality (optional)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
This function is equivalent to <A HREF="../sys/VecCheckOrthonormality.html#VecCheckOrthonormality">VecCheckOrthonormality</A>(), but in addition it checks
that the diagonal of W'*V (or W'*B*V) is equal to all ones.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../sys/VecCheckOrthogonality.html#VecCheckOrthogonality">VecCheckOrthogonality</A>()
<BR><P><B></B><H3><FONT COLOR="#883300">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#883300">Location</FONT></H3>
</B><A HREF="../../../src/sys/vec/vecutil.c.html#VecCheckOrthonormality">src/sys/vec/vecutil.c</A>
<P><H3><FONT COLOR="#883300">Examples</FONT></H3>
<A HREF="../../../src/eps/tutorials/ex47.c.html">src/eps/tutorials/ex47.c</A><BR>
<A HREF="../../../src/svd/tutorials/ex45.c.html">src/svd/tutorials/ex45.c</A><BR>
<A HREF="../../../src/svd/tutorials/ex52.c.html">src/svd/tutorials/ex52.c</A><BR>
<A HREF="../../../src/svd/tutorials/ex53.c.html">src/svd/tutorials/ex53.c</A><BR>
<BR><BR><A HREF="./index.html">Index of all sys routines</A>
<BR><A HREF="../../../docs/manual.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
</BODY></HTML>
|
