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Re: [Bug-gsl] gsl_linalg_LU_decomp and singular matrices

From: Brian Gough
Subject: Re: [Bug-gsl] gsl_linalg_LU_decomp and singular matrices
Date: Mon, 15 Jun 2009 10:53:59 +0100
User-agent: Wanderlust/2.14.0 (Africa) Emacs/22.2 Mule/5.0 (SAKAKI)

At Fri, 12 Jun 2009 18:57:40 -0400,
Erwin Kalvelagen wrote:
> gsl_linalg_LU_decomp should return an error code when the input matrix is
> singular. See any numerical library for examples. I believe ignoring this
> makes this routine of little value.

Thanks for your email.  The LU decomposition is valid for a singular
matrix so we don't return an error in that case.  

It would make sense to return an error code from gsl_linalg_LU_svx
though, I will add one there.

Brian Gough
(GSL Maintainer)

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