Originally posted by: erinas

Hello,

I am implementing a model where I need to define a decision variable as the minimum of other two decision variables. Is this possible. here is what I mean with an easy example.

{string} T= {T1,T2,T3};

dvar int+ X[t];

dvar int+ Y[t];

dvar int+ Z[t];

and in the constraints I want to write an expression to define Z[t] as the minimum of X[t] and Y[t] for each t in T. Is it possible? I tried the following but it didnt work. I need to use the expression Z[t] in the objective function. To get all the values over t, I defined it as a decision variable. It is infact a decision expression.

forall (t in T)

Z[t]==min(X[t],[t]);

Can someone help me to figure out the applicability of the model? Thank you,

Regards,

Originally posted by: ouaigooo

should be Z[t]==minl(X[t],Y[t]);

instead of Z[t]==min(X[t],[t]);

or dexpr int Z[t in T] = minl(X[t], Y[t]);

Originally posted by: erinas

Thank you!!! I really appreciate the answer.

Have a great day!