We have a question about the RHS Jacobian (G) for TS. The manual says: • Jacobian Gu If using a fully implicit method and the function G() is provided, one also can provide an appropriate (approximate) Jacobian matrix of G().
If we use, say, backward Euler and provide a G Jacobian, does PETSc use this G Jacobian in some way? or is the G Jacobian only used for IMEX methods? Mark
