pub fn hartmann6(x: &[f64]) -> f64
The Hartmann 6 function, each variable in [0, 1]; its least value is about −3.32237, near (0.20169, 0.150011, 0.476874, 0.275332, 0.311652, 0.6573).
[0, 1]
(0.20169, 0.150011, 0.476874, 0.275332, 0.311652, 0.6573)