Ariel W

for example, i design original constraints like: c1: a1*x1+a2*x2=1c2: a3*x1+a4*x2=1c3: x1+x2 ≤ 5 while new constraints will be c1: a1*x1+a2*x2 + a5*x3 + a6*x4=1c2: a3*x1+a4*x2+ a7*x3 + a8*x4=1c3: x...

May I ask whether part of the results of the heuristic algorithm search designed by myself can be input into Gurobi, so that Gurobi can continue to iterate on this basis? The heuristic algorithm he...

Using relax function of Gurobi can we derive the bound of original model? can it help me simplify the MIP model solving? how can i do this, please give me an example. Thank you!

In my model, s[v,i,j] and w[d,i,j] represent whether vehicle v operates trip j after trip i, and driver d operate trip j after trip i, respectively, they are all binary variables. I want to  give p...

I set two inquality constraints about a decision variable, it can output a determined value, What is the principle of its determination?

How do i express that "If w[d,0,j]==1 then p[d,j]==0, where w[d,i,j] is a decision variable"?  

We conduct a constraint below: where the variables in red are decision variables, others are known constants. how do i define this constraint? I  tried to write it, but I couldn't achieve accumulat...