# Maratos' problem showing the well known effect
# taken from the Chamberlain et.al. "watchdog"-paper
# written in AMPL by Yu-Ju Kuo and Hans D. Mittelmann, 6/2001
param n:=2;
var x{i in 1..n};
minimize obj:-x[1]+10*(x[1]^2+x[2]^2-1);
s.t. c1: x[1]^2+x[2]^2-1=0;

data;
var x:=1 0.8 2 0.6;