[SciPy-Dev] Strange behaviour of gmres

Pauli Virtanen pav@iki...
Mon Jun 20 18:09:56 CDT 2011

On Mon, 20 Jun 2011 22:04:19 +0200, Nils Wagner wrote:
> who can shed light on the following behaviour of gmres ?

The iteration has the default value restart=20, so it is
not guaranteed to converge fast (or at all) for matrices larger
than that. The convergence for matrices with n > restart depends
on the eigenvalue distribution etc.


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