Function hartmann3 

pub fn hartmann3(x: &[f64]) -> f64

The Hartmann 3 function, each variable in [0, 1]; its least value is about −3.86278, near (0.114614, 0.555649, 0.852547). The last center’s first coordinate is 0.0381 here, as the library lists it; some listings print 0.03815, the value that quoted point belongs to. The two least values differ by about 2×10⁻⁶ (both −3.86278 to six figures), as that coordinate’s weight, 0.1, is small.