/*D
   MPI_Graphdims_get - Retrieves graph topology information associated with a communicator

Synopsis:
.vb
int MPI_Graphdims_get(MPI_Comm comm, int *nnodes, int *nedges)
.ve

Input Parameters:
. comm - communicator for group with graph structure (handle)

Output Parameters:
+ nnodes - number of nodes in graph (same as number of processes in the group)
- nedges - number of edges in graph (integer)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_COMM
.N MPI_ERR_OTHER

D*/

