param N := 3;

var x{1..N};

minimize f:
x[1]^2 + x[2]^2 + x[3]^2;

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

subject to cons2:
x[1] >= 1;

data;
var x:=
1	1
2	1
3	1;
solve;

display x;