[petsc-users] Interior eigenvalues with slepc and shell matrix

[John Travers]

On 07 Aug 2014, at 13:30, Jose E. Roman <jroman at dsic.upv.es> wrote:

> -st_type precond

I tried that and got:

[0]PETSC ERROR: No support for this operation for this object type
[0]PETSC ERROR: EPSGD only works with KSPPREONLY

So I set:
-st_ksp_type preonly

and get:

[0]PETSC ERROR: No support for this operation for this object type
[0]PETSC ERROR: ST does not have apply

My full command line is currently: 

-eps_nev 1 -eps_tol 1e-10 -eps_type gd -st_type precond -st_ksp_type preonly

I also tried

-st_matmode shell

But it made no difference.

Really, thank you very much for your patience. I’m trying to educate myself
about slepc (which is awesome BTW, so thank you), but there are a huge
number of options!