[petsc-users] SLEPc - Generalized symmetric eigenproblem using ARPACK

[Jose E. Roman]

El 25/03/2015, a las 21:47, Harshad Sahasrabudhe escribió:

> With MUMPS you should not get spurious eigenvalues.
> I get only a few spurious eigenvalues when using MUMPS with ARPACK, but the eigenvectors are definitely wrong.
> 
> Did you try the krylovschur solver?
> Yes, Krylov-Schur gives me correct results.
> 
> How do you know the eigenvalues are wrong?
> I'm testing my implementation of Schrodinger equation solver with a 3D harmonic oscillator potential. I'm getting correct results using FEAST and krylovschur solvers.
> 
> Are you setting problem type to GHEP?
> Yes 
> 

Did you try the arpack-ng version? Seems that some people have taken over maintainance.

Anyway, why do you insist in using ARPACK when SLEPc's Krylov-Schur work? ARPACK will not give you any further advantage.

Jose