MPI Cartesian Functions

int MPI_Cart_create( MPI_Comm old_ comm,

int num_dims,

int *dim_sizes,

int *wrap_around,

int reorder,

MPI_Comm *new_comm)

int MPI_Cart_rank( MPI_comm comm,

int *coords,

int *rank)

int MPI_Comm_coords( MPI_Comm comm,

int rank,

int num_dims.

Int *coords)

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