Hi everyone, In my model, I have a variable "p" which has an upper bound pmax := 2.5 and a lower bound pmin := -2.5. I would simply like to add a binary variable "sign" which takes the values :
1 if variable p is positive 0 if variable p is negative (or vice-versa) I thought of something like : s.t c1 : sign >= p[t] / pmax; So if p[t] is positive : sign >0 and <1, therefore sign will be forced to 1. However, if p[t] is negative, "sign" is greater than a negative value so the variable is no longer constrained, and can take values 0 or 1. How can I work things out ? Thanks for your help Best regards, Philippe
