GAMS World Forum

Posted: **Thu Jul 25, 2019 2:27 am**

how to code constraint 15 in the attachment?
where x(i,t) is variable.

Posted: **Thu Jul 25, 2019 7:15 am**

Hi

Once again use $-constraints to restrain the sum

sum(k$(ord(k) > 1), 1/x(k)

If the set k has numbers as set elements (e.g. /1*10/) you can use k.val instead of ord.
Cheers
Renger

sum