#include "petscao.h" PetscErrorCode AOCreateMapping(MPI_Comm comm,PetscInt napp,const PetscInt myapp,const PetscInt mypetsc,AO *aoout)
|comm||- MPI communicator that is to share AO|
|napp||- size of integer arrays|
|myapp||- integer array that defines an ordering|
|mypetsc||- integer array that defines another ordering (may be NULL to indicate the identity ordering)|
Notes: the arrays myapp and mypetsc need NOT contain the all the integers 0 to napp-1, that is there CAN be "holes" in the indices. Use AOCreateBasic() or AOCreateBasicIS() if they do not have holes for better performance.