Model hs71
Variables
x1 = 1, >=1, <=5
x2 = 5, >=1, <=5
x3 = 5, >=1, <=5
x4 = 1, >=1, <=5
obj = 20
End Variables
Equations
x1*x2*x3*x4 > 25
x1^2 + x2^2 + x3^2 + x4^2 = 40
! best known objective = 17.0140173
obj = x1*x4*(x1+x2+x3) + x3
End Equations
End Model