# Chamberlain Example 1
# written in AMPL by Yu-Ju Kuo and Hans D. Mittelmann, 6/2001
var x{1..2}:=0;
minimize obj:x[2];
s.t. g1:x[2]-(2*x[1]^2-x[1]^3)>=0;
s.t. g2:x[2]-(2*(1-x[1])^2-(1-x[1])^3)>=0;