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Re: [Bug-gsl] Possible bug in Hessenberg-Triangular Reduction.


From: Brian Gough
Subject: Re: [Bug-gsl] Possible bug in Hessenberg-Triangular Reduction.
Date: Tue, 20 Sep 2011 17:15:10 +0100
User-agent: Wanderlust/2.15.6 (Almost Unreal) Emacs/23.3 Mule/6.0 (HANACHIRUSATO)

At Fri, 2 Sep 2011 22:19:36 +0200,
Miguel García Torres wrote:
> I have tried to port the  Hessenberg-Triangular Reduction from gsl to Java.
> However I found some wrong outputs. I sent an email to gsl-help and told
> me the it could be a bug in the code:

Thanks for the email.  I checked that the output from your code
satisfied the decompositions A=U H V^T and B=U R V^T.  A and B were
reproduced correctly in double and extended precision so I think the
results are correct.  If you have a case where that is not satisified
please let me know. 

Brian Gough







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