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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Eigenvalues to find roots of polynomials
Date: Mon, 25 Jul 2011 21:04:14 +0200
Organization: cbb software GmbH
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Date: 2011-07-25T21:04:14+02:00
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On Mon, 25 Jul 2011 10:36:14 -0700 (PDT), marius63 wrote:

> --    |   -A(1)/A(0)   -A(2)/A(0)   -A(3)/A(0)   ...   -A(N)/A(0)   |
> --    |        1            0            0       ...        0       |
> --    |        0            1            0       ...        0       |
> --    |       ...          ...           1       ...        0       |
> --    |_       0            0            0       ...        0      _|

The matrix passed to Eigenvalues (ARM G.3.2) must be Hermitian. The above
matrix is not Hermitian.

P.S. A matrix M is Hermitian if M (I,J) if the complex conjugate of M
(J,I)), i.e. Re (M(I,J)) = Re (M(J,I)) and Im (M(I,J)) = -Im (M(J,I)) 

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de