Imagine that I have two variables fw (>= 0) and a (binary) and my objective function is to
In the constraints part, I want to ensure (among other things that are not important here) that if fw > 0, then a == 1. To ensure this, I used the following expression:
M * a >= fw; #(M is a big constant)
The problem is I also want to ensure that when fw == 0, then a == 0 , and the restriction above is not sufficient (due to the fact that a is not in the objective function). Is there any way to ensure this without adding a to the objective function?