$offlisting * * Equation counts * Total E G L N X C B * 3 0 0 3 0 0 0 0 * * Variable counts * x b i s1s s2s sc si * Total cont binary integer sos1 sos2 scont sint * 5 5 0 0 0 0 0 0 * FX 0 * * Nonzero counts * Total const NL DLL * 9 5 4 0 * * Solve m using NLP maximizing objvar; Variables x1,x2,x3,x4,objvar; Positive Variables x2,x3,x4; Equations e1,e2,e3; e1.. 2*x1*x2 - x1*x1 - x2*x2 - x3*x3 + 2*x3*x4 - x4*x4 + objvar =L= 0; e2.. - x3 + x4 =L= 0; e3.. - x1 + x2 =L= 0; * set non-default bounds x1.lo = 0.5; x1.up = 1; x2.up = 1; x3.up = 1; x4.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;