Originally posted by: rapherd

Hi Guys,

I have a simple and very easy question. If I'm using a sum within my model definition (in mod file) where the lower and upper bounds are equal (something like sum(t=1,...,1)(...)) is the term in the braces executed? In my expectation yes for a single time with element t=1 but I'm not cure about that and I cannot find any documentation.

Thanks for helping me again

Raphael

I wonder what else you would expect?

If you specify the set to be iterated over as a range with equal lower and upper bound then this range has one element. This .mod file

range S = 1..1;
int count = card(S);
dvar int x[S];

minimize sum(s in S) x[s];
subject to { sum(s in 1..1) x[s] >= 3.0; }
execute { writeln("count = " + count + ", x =" + x); }

prints

count = 1, x = [3]

as expected.