> I have a set like in the picture
>
> http://www.nabble.com/user-images/2538.jpg
> and I want to consider it in the constraint as
> http://www.nabble.com/user-images/2540.jpg
>
>
> For this I have written as
>
>
> s.t. cons_N2 {j in M}: sum {k in K, i in N: (j,p) in J [i,k]} x [i,j,p] <=
> 1;
>
> and in some other forms however I got dimensional error messages. Am I
> defining it wrong or sth else?
> Can anyone help me?
>
> Or how can I define a set like those in the pictures.
Literally, as it is written in your textbook:
s.t. foo{i in N, k in K}: sum{(j, rho) in J[i,k]} x[i,j,rho] <= 1;
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