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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, 24 Nov 2017 12:34:09 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0 
Follow-up Comment #18, bug #49523 (project octave):

@Rik: I'm going to implement the NaN + i*0 version for both eigenvalues and
eigenvectors. Now that eigs in octave is going to be in a good shape, I
discovered that matlab switched to "A Krylov Schur algorithm for large
eigenproblems". I found only a simple implementation around
(https://github.com/dingxiong/KrylovSchur), so I think that matlab implemented
it from scratch.

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