[Trilinos-Users] Confusing behavior from Anasazi

[Alicia Klinvex]

Hello Joe,

I'm sorry you're having some trouble with Anasazi, and I hope we can help.
Can you tell us a little more about your problem first though?  For
instance, which eigensolver are you using?  What parameters did you set?
Is your matrix singular or ill-conditioned?  Are you storing it as a
CrsMatrix?  Are the eigenvalues clustered?

Thank you,
Alicia

On Sat, Dec 19, 2015 at 6:31 PM, Rutherford, Joseph M <jmruther at illinois.edu
> wrote:

> Anasazi team:
>
>
>
> When I attempt to solve a non-Hermitian real or complex eigenvalue problem
> for the smallest magnitude Eigenvalues, Anasazi freezes with full CPU
> utilization.  Largest magnitude eigenvalue solves converge.  Does anyone
> have guidance for how to determine what I’m doing wrong?
>
>
>
> I seem to be stuck in the while(doGramSchmidt) loop at line 564 of
> AnasaziSVBQOrthoManager.cpp.
>
>
>
> I should point out that in my nontrivial cases which do converge the
> answers are in disagreement with other tools. However, it seems more
> important to resolve the hanging than to figure out why the answers differ.
> The test C++ code can be shared if need be.
>
>
>
> Sincerely,
>
>
>
> Joe
>
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