#include "petscis.h" PetscErrorCode ISPairToList(IS xis, IS yis, PetscInt *listlen, IS **islist)Collective on indis.
| xis | - domain IS | |
| yis | - range IS |
| listlen | - length of islist | |
| islist | - list of ISs breaking up indis by color |
| xis and yis must be of the same length and have congruent communicators. | - - The resulting ISs have subcommunicators in a "deadlock-free" order (see ISListToPair()). |