$offlisting * * Equation counts * Total E G L N X C B * 8 1 0 7 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 * 17 14 3 0 * * Solve m using NLP minimizing objvar; Variables x1,x2,x3,x4,objvar; Equations e1,e2,e3,e4,e5,e6,e7,e8; e1.. - x4 + objvar =E= 0; e2.. POWER(x1,4)*POWER(x2,4) - POWER(x1,4) - POWER(x2,4)*x3 =L= 0; e3.. - x1 - 0.25*x4 =L= -1.4; e4.. x1 - 0.25*x4 =L= 1.4; e5.. - x2 - 0.2*x4 =L= -1.5; e6.. x2 - 0.2*x4 =L= 1.5; e7.. - x3 - 0.2*x4 =L= -0.8; e8.. x3 - 0.2*x4 =L= 0.8; 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% minimizing objvar;