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[Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not
From: |
Marco Caliari |
Subject: |
[Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values |
Date: |
Fri, 7 Apr 2017 04:55:17 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0 |
Follow-up Comment #2, bug #49523 (project octave):
I created a reproducible example for this issue.
A = toeplitz ([-2, 1, zeros(1, 8)]);
A = kron (A, eye (10)) + kron (eye (10), A);
opts.v0 = (1:100)';
opts.maxit = 1;
eigs (A, 4, "sm", opts)
warning: eigs: Only 3 of the 4 requested eigenvalues converged
warning: called from
eigs at line 266 column 18
ans =
0.00000
-0.16203
-0.39851
-0.39851
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- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values,
Marco Caliari <=
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, Marco Caliari, 2017/04/07
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, Marco Caliari, 2017/04/10
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, Rik, 2017/04/10
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, anonymous, 2017/04/10
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, Rik, 2017/04/10
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, anonymous, 2017/04/10
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, Marco Caliari, 2017/04/11
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, Rik, 2017/04/11
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, Marco Caliari, 2017/04/12
- [Octave-bug-tracker] [bug #49523] eigs (R2013b and later) uses NaNs, not zeros, for unconverged Ritz values, Rik, 2017/04/12