[SciPy-User] solving large sparse linear system with Laplacian matrix
David Warde-Farley
dwf at cs.toronto.edu
Fri Oct 30 04:43:23 EDT 2009
On 30-Oct-09, at 4:25 AM, josef.pktd at gmail.com wrote:
> I don't know about memory consumption but I think
> scipy.sparse.linalg.factorized(A)
> should be more efficient if you need to solve for several right hand
> sides.
You may be right but the factorized matrices may be an awful lot
denser which could impact her memory requirements.
You may have some luck with lgmres and/or bicg, as far as I know
neither imposes conditions on positive definiteness.
You might also look at http://code.google.com/p/pyamg/ - they have a
lot of other methods implemented, possibly some specially optimized
for symmetric banded matrices.
David
More information about the SciPy-User
mailing list