Ronald van der Velden

Hi Carlos, What if you would introduce a variable to represent the magnitude of the reset \(r_t\) ; then you constraint becomes \(p_t=p_{t-1} + w_t * C - r_t\). You could then add indicator constr...

Hi Summer, You could try \(Y \leq M \cdot X\), where \(M\) is a number that is at least as large as the upperbound of \(Y\). Ideally you keep \(M\) as tight as possible to avoid running into numeri...

Hi Alexandra, We optimize highest priority first, so that's why Z3 is solved first in your case. When you iterate over range(3) to retrieve the objective values, you'll always get the same objecti...

Hi Carl, Unfortunately I can't help you debug this step-by-step. I don't believe the error you see is optimization-specific: you should be able to add breakpoints to your code and inspect variable ...

The inner quicksum seems incorrect - you reference d which is not defined anywhere. Then you take the max over just a single quicksum. You need multiple things to take the maximum; I guess you wil...

Please have a look at (the end of) this question about the same problem.

Ah, sorry about that - I should have tested your exact scenario in full and had ignored the fact that calling relax() returns a new model where you cannot query attributes based on constraints from...

I would consider using addConstrs() for each of the constraint sets. It gives you back a dictionary, e.g. a mapping of i/j/d indices to constraints. Then you can pass that result to getAttr() and y...

Have you tried it step-by-step and where did you get stuck exactly? I would start creating a variable containing the value of the inner sum. Then try to create the max and finally the outer sum.

For completeness: I believe if you stayed with your existing approach, you would need to model the second constraint as y(p, t) * e(L1) <= t to make it work. Whenever y(p,t)=0 the constraint become...