#include "petscsf.h" PetscErrorCode PetscSFComposeInverse(PetscSF sfA,PetscSF sfB,PetscSF *sfBA)
sfA | - The first PetscSF, whose local space may be a permutation, but can not be sparse. | |
sfB | - The second PetscSF, whose number of leaves must be equal to number of leaves of sfA on each processor. All roots must have degree 1. |