param N := 2;

var x{1..N};

minimize f:
(x[2] - x[1])^4 - (1-x[1]);

subject to cons1:
-1*x[1]^2 - x[2]^2 + 1 >= 0;

subject to cons2:
0.2 <= x[1] <= 2;

subject to cons3:
0.2 <= x[2] <= 2;

data;
var x:=
1	0
2	0;

solve;

display x;