[Help-glpk] Question about set expression

[Juan Pablo Caballero Villalobos]

Hello for everyone involved in this amazing project.

I have a question related with how to filter some elements from a set by using 
conditional expressions.

For example, I have a set of elements made up by 3-tuples

   set O dimen 3; /* Operations of plates of Jobs (k, l, m) */

Later in a constraint, I just need to use the 3-tuples elements which third 
entry is equal to an specific value: (J set elements are composed by 1-tuples)
 
   s.t. completionTime{j in J,o in O: o=(*,*,j)}: v_c[j] >= v_b[o]+sum{m in M} 
b_omega[o,m]*(p_a[o,m]*p_p[o,m]);
  
I have tried with this expression {j in J,o in O: o=(*,*,j)} but it does not 
work.


I really appreciate any suggestion or direction about how to overcome this 
problem,

Thank you in advance for your attention and help.



Ing Juan Pablo Caballero
Universidad Javeriana, 
Bogotá Colombia (SouthAmerica)





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