[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Octave-bug-tracker] [bug #53897] poly of conjugate complex pairs should

From: Marco Caliari
Subject: [Octave-bug-tracker] [bug #53897] poly of conjugate complex pairs should return a real polynomial
Date: Wed, 17 Oct 2018 14:37:57 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0

Follow-up Comment #6, bug #53897 (project octave):

As far as I know, eig (that is, the undelying LAPACK routines) gives exact
complex conjugates for real matrices. This is confirmed by experiments like

octave:1> A = randn (100);
octave:2> x = eig (A);
octave:3> all(sort(x(imag(x)>0))==sort(conj(x(imag(x)<0))))
ans = 1

Therefore, I would not introduce the tolerance.


Reply to this item at:


  Message sent via Savannah

reply via email to

[Prev in Thread] Current Thread [Next in Thread]