```public inbox for gsl-discuss@sourceware.org
help / color / mirror / Atom feed```
```* typo in online GSL documentation for SVD
@ 2012-01-20 20:07 William Wu
2012-02-03 15:16 ` Rhys Ulerich
From: William Wu @ 2012-01-20 20:07 UTC (permalink / raw)
To: gsl-discuss

Hello GSL developers,

I may have noticed a small typo in the online documentation for the
Singular Value Decomposition, which can be found at

http://www.math.utah.edu/software/gsl/gsl-ref_206.html

"A general rectangular @math{M}-by-@math{N} matrix @math{A} has a
singular value decomposition (SVD) into the product of an
@math{M}-by-@math{N} orthogonal matrix @math{U}, an
@math{N}-by-@math{N} diagonal matrix of singular values @math{S} and
the transpose of an @math{M}-by-@math{M} orthogonal square matrix
@math{V}"

However, I think the matrix V should be N-by-N in order for the matrix
multiplication A = U S V^T to make sense. So the corrected sentence
would be:

"A general rectangular @math{M}-by-@math{N} matrix @math{A} has a
singular value decomposition (SVD) into the product of an
@math{M}-by-@math{N} orthogonal matrix @math{U}, an
@math{N}-by-@math{N} diagonal matrix of singular values @math{S} and
the transpose of an @math{N}-by-@math{N} orthogonal square matrix
@math{V}"

Thank you for the GSL.

Regards,
--
William Wu

```* Re: typo in online GSL documentation for SVD
2012-01-20 20:07 typo in online GSL documentation for SVD William Wu
@ 2012-02-03 15:16 ` Rhys Ulerich
0 siblings, 0 replies; 2+ messages in thread
From: Rhys Ulerich @ 2012-02-03 15:16 UTC (permalink / raw)
To: William Wu; +Cc: gsl-discuss

Hi William

> I may have noticed a small typo in the online documentation for the
> Singular Value Decomposition, which can be found at
>
>      http://www.math.utah.edu/software/gsl/gsl-ref_206.html

Thank you for the bug report.  It appears this has already been fixed
you provided with the latest at

http://www.gnu.org/software/gsl/manual/html_node/Singular-Value-Decomposition.html

Cheers,
Rhys

```end of thread, other threads:[~2012-02-03 15:16 UTC | newest]
```This is a public inbox, see mirroring instructions