GAMS World Forum

Yanzhiping,

Thet way I initially formulated the response to your question is that you have some sort of variable Q that can be either positive or negative. I assumed you wanted to have the absolute value of Q.

If this is not the case I misunderstood your question. If thgis is the case, the code I provided is the correct way to model this problem.

best,

Gideon

but in this way the abs() will make the problem non-linear.



เย็ดสาว

Hi Phallylka,
That's why you use the Steve and I described, so your system remains linear.
Best, Gideon