int MPI_Cancel int MPI_Cart_coords int MPI_Cart_create int MPI_Cart_get int MPI_Cart_map int MPI_Cart_rank int MPI_Cart_shift int MPI_Cart_sub int MPI_Cartdim_get int MPI_Comm_compare int MPI_Comm_create int MPI_Comm_dup int MPI_Comm_free int MPI_Comm_group int MPI_Comm_rank int MPI_Comm_remote_group int MPI_Comm_remote_size int MPI_Comm_set_attr int MPI_Comm_size int MPI_Comm_split int MPI_Comm_test_inter