KrylovSolver : is there any way to edit KrylovSolver class ??

Question

Here is my problem:

I am looking for a way to get inside PETSc gmres method, I want to return the basis spanning the Krylov subspace at the convergence.

Thank you for your help

Answer 1

Yes, you can do this. It is possible to get the PETSc objects directly from the dolfin wrappers. You can get the PETSc KSP object by calling PETScKrylovSolver::ksp().