Originally posted by: TuPeM

I'm currently struggling to formulate the term which is attached and part of a longer formula. Cplex cannot extract it and i know the programming is not correct.

Currently i have the following formulation

forall (t in periods, ..., v in variants)

... + sum (s in periods: t-RT+1 <= s <= t) E[v][s] + ...

RT is a fixed value that is e.g. 4. while t<RT, s should start with the value of 1.  for t is 5,6,7,... s should start at 2,3,4,... respectively and sum up to t.

the formulation somehow needs to be like this , but i don't know which expressions to use

sum(s in periods: max(1,t-RT+1 <= s) E[v][s]

Any help is much appreciated!

Originally posted by: Rajasekhar_Kadambur

Hi,

Try this

forall(t in periods, v in variants)

sum(s in periods: s>=maxl(1,t-RT+1 )) E[v][s]