GAMS World Forum

Hi Fred,

Thank you for replying and confirming that my syntax is correct. I will keep experimenting with the code, and if I need further assistance I will post code and log files. Cheers!

Greg

Hi, I'm using Lindo to find a global solution to a large MINLP flow network optimization problem. I'm attempting to reduce my solve time by parallelizing Lindo. I tried setting threads to n=-2 using the GAMS command line parameter 'threads' based on https://www.gams.com/mccarlGuide/threads.htm optio...

Hi, I'm working on a node network model that routes water through nodes representing a river system to satisfy agricultural demand for water (Demand_AG). The issue I have is with my flow balance at nodes (EQ3a). This constraint is currently formulated as an inequality such that flows entering each n...

Hi,

Thank you for your response. What I’m confused about in your proposed formulation is how it ensures that when X=0 that B is all =0. Isn’t it the case that when X=0 that B can equal either 0 or 1? Thanks again for your help!

Hi,

Thank you for your response. What I’m confused about in your proposed formulation is how it ensures that when X=0 that B is all =0. Isn’t it the case that when X=0 that B can equal either 0 or 1? Thanks again for your help!

Hi everyone, I am working on an MIP optimization problem where X is a positive variable with a lower bound of zero and no upper bound and B is a binary variable. X{0,inf} and B{0,1} I'm trying to formulate equations such that if X =E= 0 then B =E= 0, else B=E=1. I've bound B with the following const...