Function argmin_testfunctions::beale

source ยท 
pub fn beale<T>(param: &[T; 2]) -> T
where
    T: Float + FromPrimitive,
Expand description

Beale test function

Defined as

f(x_1, x_2) = (1.5 - x_1 + x_1 * x_2)^2 + (2.25 - x_1 + x_1 * x_2^2)^2 + (2.625 - x_1 + x_1 * x_2^3)^2

where x_i \in [-4.5, 4.5].

The global minimum is at f(x_1, x_2) = f(3, 0.5) = 0.