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

[Jose E. Roman]

El 07/08/2014, a las 14:05, John Travers escribió:

> 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!
> 
> 

These options work well with SLEPc's ex1.c, so you must have something different in your source code. Send the code excerpt that sets EPS/ST options.

Jose