#if !defined(DMPRODUCT_H_)
  #define DMPRODUCT_H_

  #include <petscdm.h>

PETSC_EXTERN PetscErrorCode DMCreate_Product(DM);
PETSC_EXTERN PetscErrorCode DMProductGetDM(DM, PetscInt, DM *);
PETSC_EXTERN PetscErrorCode DMProductSetDimensionIndex(DM, PetscInt, PetscInt);
PETSC_EXTERN PetscErrorCode DMProductSetDM(DM, PetscInt, DM);

#endif