MPI COMM GROUP Definition of mel comm world Default communicator consisting of all processes Definition of mel group incl Used to form a new group from the processes belonging to group within specified ranks Definition of mpl comm create Used to create a new intracommunicator from the processes listed in new group Definition of mpl group rank Used to return the rank of the calling process in groupMPI_COMM_GROUP • Definition of MPI_COMM_WORLD – Default communicator consisting of all processes. • Definition of MPI_GROUP_INCL – Used to form a new group from the processes belonging to group within specified ranks. • Definition of MPI_COMM_CREATE – Used to create a new intracommunicator from the processes listed in new_group. • Definition of MPI_GROUP_RANK – Used to return the rank of the calling process in group