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[Bug-gsl] About gsl_linalg_cholesky_svx(A,x)

From: Chuhu Yang
Subject: [Bug-gsl] About gsl_linalg_cholesky_svx(A,x)
Date: Sat, 16 Sep 2006 20:36:26 -0500
User-agent: Microsoft-Entourage/

Dear Mir or Madam,
Recently, I was using gsl. I found one problem with the function
I want to obtain a solution to a linear function AX=b. I used
gsl_linalg_cholesky_decomp(A) first. I obtained a correct Cholesky factor L.
A after calling gsl_linalg_cholesky_decomp is a combination of L and L'.
Then I used gsl_linalg_cholesky_svx(A,X) with A from the first step. I
couldn't obtain correct solution for X. I guess there is a bug in
However, I can get a correct solution by using
gsl_linalg_HH_svx(A,X) directly.
I hope this might help to make the function gsl_linalg_cholesky_svx better.

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