New answers tagged ampl
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I'm not familiar with GLPK, but since it's based on AMPL, the following AMPL implementation might be of some help:
set I;
set J;
set K {I};
param J0 {i in I} symbolic = "0" & i;
param JT {i in I} symbolic = "T" & i;
set N {i in I} = {J0[i],JT[i]} union J;
set Nall = (union {i in I} {J0[i],JT[i]}) union J;
GLPK uses only a ...
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