Dear all,

I would really like to seek for your kind help regarding an if-then constraint. I found in the community a similar topic but my condition is a bit different from that, therefore I want to show my case and ask for your tips again.

Specifically, I have the following variables:

A: decision variable

B: variable

Q: variable

And I want to achieve the following:

1)if A-B>=0, then Q=A-B

2)if A-B<0, then Q=0

I would like to ask if it is possible to consrtuct a linear formulation for this if-then logic to be realised.

Many thanks in advance!

Xubo

**Best answer by Marcel Hunting**