* Use command line '--keep-cout' to see output from all processors for multi-processor run.

  * Use command line '-ksp_type' to choose the petsc solver kind.  Examples are 'richardson, cg, gmres, bicg'

  * Use command line '-pc_type' to choose the preconditioner.  Examples are 'ilu, jacobi, sor'

  * See also "PETSc Solver Options":http://www.cmiss.org/openCMISS/wiki/PETScSolverOptions for more details on using PETSc.