$offlisting * * Equation counts * Total E G L N X C B * 10 0 0 10 0 0 0 0 * * Variable counts * x b i s1s s2s sc si * Total cont binary integer sos1 sos2 scont sint * 9 9 0 0 0 0 0 0 * FX 0 * * Nonzero counts * Total const NL DLL * 38 14 24 0 * * Solve m using NLP maximizing objvar; Variables x1,x2,x3,x4,x5,x6,x7,x8,objvar; Positive Variables x3,x4,x5,x6,x7,x8; Equations e1,e2,e3,e4,e5,e6,e7,e8,e9,e10; e1.. 2*x1*x2 - x1*x1 - x2*x2 - x5*x5 + 2*x5*x6 - x6*x6 + objvar =L= 0; e2.. 2*x1*x3 - x1*x1 - x3*x3 - x5*x5 + 2*x5*x7 - x7*x7 + objvar =L= 0; e3.. 2*x1*x4 - x1*x1 - x4*x4 - x5*x5 + 2*x5*x8 - x8*x8 + objvar =L= 0; e4.. 2*x2*x3 - x2*x2 - x3*x3 - x6*x6 + 2*x6*x7 - x7*x7 + objvar =L= 0; e5.. 2*x2*x4 - x2*x2 - x4*x4 - x6*x6 + 2*x6*x8 - x8*x8 + objvar =L= 0; e6.. 2*x3*x4 - x3*x3 - x4*x4 - x7*x7 + 2*x7*x8 - x8*x8 + objvar =L= 0; e7.. - x5 + x6 =L= 0; e8.. - x1 + x2 =L= 0; e9.. - x2 + x3 =L= 0; e10.. - x3 + x4 =L= 0; * set non-default bounds x1.lo = 0.5; x1.up = 1; x2.lo = 0.5; x2.up = 1; x3.up = 1; x4.up = 1; x5.up = 1; x6.up = 1; x7.up = 1; x8.up = 1; Model m / all /; m.limrow=0; m.limcol=0; m.tolproj=0.0; $if NOT '%gams.u1%' == '' $include '%gams.u1%' $if not set NLP $set NLP NLP Solve m using %NLP% maximizing objvar;