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## [Bug-gsl] Letter of apology

 From: vtl Subject: [Bug-gsl] Letter of apology Date: Fri, 01 Jan 2010 19:45:19 +0100

```Sorry!!

Due to a mistake by me I've reported an unexisting bug. I'm sorry... (I'm not a
mathematician but a medical doctor...) I feel ashamed...

Best regards!

VT

--
Dr. Volker Thieme
Rochlitzstraße 65
Leipzig
04229
Germany

volker.thieme_(at)_mac.com

Anfang der weitergeleiteten E-Mail:

> Datum: 1. Januar 2010 15:35:00 MEZ
> Betreff: Error in gsl_blas doc
>
> Hi All!
>
> Happy New Year!
>
> Thank you for making GSL!
>
> But: There is a minor bug in
> http://www.gnu.org/software/gsl/manual/html_node/Level-1-GSL-BLAS-Interface.html:
>
> <QUOTE>
> — Function: int gsl_blas_srotg (float a[], float b[], float c[], float s[])
> — Function: int gsl_blas_drotg (double a[], double b[], double c[], double
> s[])
> These functions compute a Givens rotation (c,s) which zeroes the vector (a,b),
>
>          [  c  s ] [ a ] = [ r ]
>          [ -s  c ] [ b ]   [ 0 ]
>
> The variables a and b are overwritten by the routine.
> </QUOTE>
>
> should be:
>
> — Function: int gsl_blas_srotg (gsl_vector_float *X, gsl_vector_float *Y,
> float c, float s)
> — Function: int gsl_blas_drotg (gsl_vector *X, gsl_vector *Y, double c,
> double s)
> These functions compute a Givens rotation (c,s) which zeroes the vector (X,Y),
>
>          [  c  s ] [ X ] = [ r ]
>          [ -s  c ] [ Y ]   [ 0 ]
>
> The variables c and s are overwritten by the routine.
>
> Kind regards!
>
> VT
>
> --
> Dr. Volker Thieme
> Rochlitzstraße 65
> Leipzig
> 04229
> Germany
>
> volker.thieme_(at)_mac.com
>
>
>

```