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From "Thomas Neidhart (Updated) (JIRA)" <>
Subject [jira] [Updated] (MATH-235) Eigenvalues/eigenvectors of real asymmetric matrices
Date Sun, 22 Jan 2012 12:23:40 GMT


Thomas Neidhart updated MATH-235:

    Attachment: MATH-235_HessenbergTransformer.patch

As a first step, I worked on a Hessenberg Transformer to reduce a non-symmetric matrix to
Hessenberg form.

The code is taken mainly from jama and follows the TridiagonalTransformer.
> Eigenvalues/eigenvectors of real asymmetric matrices
> ----------------------------------------------------
>                 Key: MATH-235
>                 URL:
>             Project: Commons Math
>          Issue Type: New Feature
>    Affects Versions: 2.1
>            Reporter: James Housden
>            Priority: Minor
>             Fix For: 3.1
>         Attachments: MATH-235_HessenbergTransformer.patch
> The EigenDecompositionImpl class contains methods to calculate the eigenvalues/eigenvectors
of real symmetric matrices. However, for real asymmetric matrices there are currently no methods
available to do this.
> It would be nice if commons-math could be enhanced to provide this extra functionality.
> Please note that the JAMA package contains a possible implementation in its EigenvalueDecomposition

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