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From: Ada novice <shai.lesh@gmx.com>
Newsgroups: comp.lang.ada
Subject: Re: ANN: Ada 2005 Math Extensions 20120712
Date: Sun, 29 Jul 2012 08:02:32 -0700 (PDT)
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Date: 2012-07-29T08:02:32-07:00
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On Sunday, July 29, 2012 3:52:08 PM UTC+1, Nasser M. Abbasi wrote:
> On 7/29/2012 9:34 AM, Ada novice wrote:

Yes, different software can produce different eigenvectors. It depends on the algorithm used. I remember (but not 100% sure) that in Matlab, [V,D] = eig(A,B) and [V,D] = eig(A,B,'qz')

where 

'qz'

ignores the symmetry, if any, and uses the QZ algorithm as it would for nonsymmetric (non-Hermitian) A and B

produced different eigenvectors.


Eigenvalues are bound to be the same in any software independent of the algorithm used as they represent an intrinsic property of a system.


YC