bulk::cartesian_partitioning::global
using multi_partitioning<D, G>::global;
virtual int global(int g, int u, int i); // overload
Convert a local index to a global one (overload).
Parameters
g: the axis for which to compute the indexu: thegth component of the local multi ranki: thegth component of the local index
Return value
int: thegth component of the global index