Hi guys I'm having problems with creating a subset.
What I want to be able to do is this: sum for s in S', forall S' where S' is a subset of Sc such that the size of S' = mc[c]
set S; /* The set of servers */
set C; /* The set of Cluster */ set Sc {c in C}; /* The set of servers in cluster c */ param mc {c in C}, integer, > 0;