$ontext gppL6 pooling problem data. Author: Mohammed Alfaki, Wed Nov 9 15:36:09 2011 $offtext $eolcom # # Declare sets set i / 1*8 /; set s(i) / 1*4 /; set t(i) / 7*8 /; set k / 1*1 /; alias (i,j); # The arc unit cost c_{ij} table c(i,j) 5 6 7 8 1 6.00 0.00 0.00 0.00 2 15.00 0.00 0.00 0.00 3 16.00 0.00 0.00 0.00 4 0.00 10.00 0.00 0.00 5 0.00 0.00 -9.00 -15.00 6 0.00 0.00 -9.00 -15.00 ; # The adjacency matrix (the arcs set A) table a(i,j) 5 6 7 8 1 1 0 0 0 2 1 0 0 0 3 1 0 0 0 4 0 1 0 0 5 0 1 1 1 6 1 0 1 1 ; # Source qualities/terminal quality upper bounds table q(i,k) 1 1 3.00 2 1.00 3 1.00 4 2.00 7 2.50 8 1.50 ; # Node capacity lower bound parameter bl(i) / 1 0.00 2 0.00 3 0.00 4 0.00 7 0.00 8 0.00 / ; # Node capacity upper bound parameter bu(i) / 1 300.00 2 50.00 3 300.00 4 300.00 5 300.00 6 300.00 7 100.00 8 200.00 / ; $include xmodel.gms