Dear Wolfgang, I'd like to use some PETSC functions that aren't available in deal ii - specifically the MatShell command that allows you to define a matrix in terms of the matrix-vector product, and then use it in solvers. Later I will probably use SLEPC, which also uses PETSC vectors. The PETSc Wrapper vector classes have a conversion to Vec function, but it has a warning on it. How bad of an idea is it to do this conversion? (other options: implement a petsc wrapper class for MatShell, switch from PetscWrappers to Vecs and just use dealii for the dof_handler and finite element classes). What do you think?
Pearl _______________________________________________
