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Yes, it worked and I learnt it! Thank you very much

Hi. I am new to the most parts of GAMS and I couldn't figure out how to write a constraint. - I have a set i and its alias j. - I also have set k. - The variable is y(i,j,k). - I have a parameter of p(j) and a scalar M. - The constraint is for every j and k, and goes as this y(i,j,k)= M- p(k)* ( y(1...