PETSC_EXTERN_TYPEDEF typedef PetscErrorCode(NEPFunctionFn)(NEP nep,PetscScalar lambda,Mat T,Mat P,void *ctx);
nep | - eigensolver context obtained from NEPCreate() | |
lambda | - the scalar argument where T(.) must be evaluated | |
T | - matrix that will contain T(lambda) | |
P | - [optional] different matrix to build the preconditioner | |
ctx | - [optional] user-defined context for private data for the function evaluation routine (may be NULL) |