dempe problem mpec Knitro AMPL short = 0; minimize f: (x - 3.5)^2 + (z + 4)^2; subject to con1: z - 3 + 2*z*w = 0; con2: 0 >= z^2 - x complements w >= 0; ]]> # starting point let x := 1; let z := 1; let w := 1; let x := 0.183193 ; let z := 0.428106; let w := 3.00379; solve; display _varname, _var; Knitro-AMPL sample submission