$ontext gppA4 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*3 /; set t(i) / 6*8 /; set k / 1*2 /; alias (i,j); # The arc unit cost c_{ij} table c(i,j) 4 5 6 7 8 1 3.00 3.00 -2.00 -4.00 0.00 2 0.00 0.00 -5.00 -7.00 0.00 3 3.00 0.00 0.00 0.00 -7.00 4 0.00 0.00 -5.00 -7.00 -10.00 5 0.00 0.00 -5.00 -7.00 -10.00 ; # The adjacency matrix (the arcs set A) table a(i,j) 4 5 6 7 8 1 1 1 1 1 0 2 1 1 1 1 0 3 1 0 0 0 1 4 0 1 1 1 1 5 0 0 1 1 1 ; # Source qualities/terminal quality upper bounds table q(i,k) 1 2 1 9.00 5.00 2 0.00 4.00 3 7.00 4.00 6 4.00 5.00 7 5.00 4.00 8 5.00 4.00 ; # Node capacity lower bound parameter bl(i) / 1 0.00 2 0.00 3 0.00 6 0.00 7 0.00 8 0.00 / ; # Node capacity upper bound parameter bu(i) / 1 50.00 2 48.00 3 32.00 4 43.00 5 50.00 6 46.00 7 39.00 8 45.00 / ; $include xmodel.gms