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Problems regarding one formula:

Question asked by on Aug 7, 2014
Latest reply on Aug 8, 2014 by

Hi Everybody!


I'm fairly new to Xpress and had to develop an ILP for my thesis and calculate it with Xpress.


Now I am stuck on a formula I don't know how to express within the Mosel language. Maybe you guys can help me.


It's about assigning referees to the right matches within a soccer season


the formula:


1/Tr (forall m in M) ∑ d(r,m) + x(r,m) - 1/T^r (forall m in M) ∑ d(^r,m) + x(^r,m) <= dmax        for all r, ^r in R


Tr is a target value and is given

d(r,m) is the distance between referee r and match m

dmax is the maximum difference each referee is allowed to have to each other

x(r,m) is the wanted variable if referee r is assigned to match m or not


M and R are just the sets - 180 Matches, 10 Referees (Austria, small country )


I don't know how to compare each referee with each other referee within the Mosel system...


any ideas?