Re: GSoC 2015: improving matrix funtcions

[Antonio Pino]

al., 2015.eko marren 16a 21:28(e)an, Jordi Gutiérrez Hermoso igorleak
idatzi zuen:
> Can you understand any of the papers in this website?
> 
>     http://www.maths.manchester.ac.uk/~higham/NAMF/
> 
> All the links are dead, but perhaps you can still find the articles
> otherwise.

I wanted to go deep into at least one of the articles to further
responding. The one I have chosen is the one named "Computing the Matrix
Cosine" by N.J. Higham and M.I. Smith.

After compiling octave, I have written a draft of a would be cosm
function. It seems to compare well to the actual funm in octave and
real(expm()).

This has brought up to a couple of questions about testing matrix
funcions: is there any way to systematically test a (matrix) function?
The second one is about Padé approximations in octave, right now I am
using sympy (sympy.org) for that purpose.

Either way, my plan for the gsoc is to follow the articles and try to
effectively implement and test all of them.

Finally, I provide you with the m file and new (working) links to the
articles.

Regards,

Antonio PR

cosm.m
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octave matrix-functions articles.txt
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