[petsc-users] KrylovSchur solver diverges when setting EPS_GHEP

[Jose E. Roman]

El 07/11/2014, a las 15:45, Denis Davydov escribió:

> 
>> What do you mean by 'breaks convergence'? Are you sure your matrices are symmetric?
>> Jose
> 
> I shall clarify that the calculated by EPSComputeResidualNorm residual norm 
> is bigger than the required tolerance, set by EPSSetTolerances. 
> 
> In light of your latest answer about B-norms, 
> supposedly this is a wrong approach. 
> 
> Sorry for being un-precise initially.
> 
> Regards,
> Denis.

Yes, EPSComputeResidualNorm uses the 2-norm.
Maybe it would be better if the stopping criterion in symmetric problems would be more similar to the non-symmetric case. I will think about it. It would be good if you could send me sample matrices (to my personal email).

Jose