PETSC_EXTERN PetscErrorCode TSDiscGradSetFormulation(TS, PetscErrorCode(*)(TS, PetscReal, Vec, Mat, void *), PetscErrorCode(*)(TS, PetscReal, Vec, PetscScalar *, void *), PetscErrorCode(*)(TS, PetscReal, Vec, Vec, void *), void *); PETSC_EXTERN PetscErrorCode TSDiscGradIsGonzalez(TS,PetscBool*); PETSC_EXTERN PetscErrorCode TSDiscGradUseGonzalez(TS,PetscBool);
.seealso: TS, TSDISCGRAD, TSDiscGradSetFormulation(), TSDiscGradGetFormulation