[petsc-users] Question about KSP

[Elias Karabelas]

Dear all,

I have a question about preconditioned solvers. So, I have a 
Sparsematrix, say A, and now for some reason I would like to add some 
rank-one term u v^T to that matrix.
As far as I know about Petsc, I can define the action of this matrix 
with MatShell. But is it possible to adapt the preconditioner (like a 
AMG) of my KSP to handle that kind of MatShell?

Kind Regards
Elias

-- 
Dr Elias Karabelas

Medical University of Graz
Institute of Biophysics
Harrachgasse 21/IV
8010 Graz, Austria

Phone: +43 316 380 7759
Email: elias.karabelas at medunigraz.at
Web  : http://forschung.medunigraz.at/fodok/staff?name=EliasKarabelas