On 8/16/06, **Nils Wagner** <nwagner@iam.uni-stuttgart.de> wrote:

I did try pysparse a few years ago (I think right before sparse stuff came into scipy). I think there is probably an old post asking the list about sparse stuff and I think Travis had just written it and told me about it... can't remember. Can JDSYM just return the k lowest eigenvalues/eigenvectors?
Keith Goodman wrote:

> On 8/15/06, David Grant <davidgrant@gmail.com> wrote:

>

>

>> My idea is (if I have time) to write an eigs-like function in python

>> that will only perform a subset of what Matlab's eigs does for. It

>> will, for example, compute a certain number of eigenvalues and

>> eigenvectors for a real, sparse, symmetric matrix (the case I'm

>> interested in)

>>

>

>

AFAIK, pysparse (in the sandbox) includes a module that implements a

Jacobi-Davidson

eigenvalue solver for the symmetric, generalised matrix eigenvalue

problem (JDSYM).

Did someone test pysparse ?

--

David Grant

http://www.davidgrant.ca