in Gams, how should I express the following inequality after
I don't know how the above i should be defined in SETS and how to express the above inequality. Thank you very much in advance. 
You define the set i separately in your sets section and do as follows.
Please note that as x(j,k,l) is not part of the summation over i, you can bring it out of the summation. answered 05 Nov '13, 00:48 Ehsan ♦ Thanks very much. That helps me a lot.
(05 Nov '13, 10:10)
Mike390
