MPI_Gather MPI_Gather MPI_Get_count MPI_Get_elements MPI_Get_processor_name MPI_Get_version MPI_Graph_create MPI_Graph_get MPI_Graph_map MPI_Graph_neighbors_count MPI_Graph_neighbors MPI_Graphdims_Get MPI_Group_compare MPI_Graph_neighbors MPI_Graphdims_Get MPI_Group_compare