# Model tp128
var x_1;
let x_1 := 1;
var x_2;
let x_2 := 1;
minimize obj: x_1^2 + x_2^2;
subject to ce_1: x_1^4 + x_2^4 = 0;
display obj;
solve;
display obj;
display x_1;
display x_2;
display obj - 0;
display x_1 - 0;
display x_2 - 0;