[−][src]Function argmin_testfunctions::easom
pub fn easom<T: Float + FromPrimitive>(param: &[T]) -> T
Easom test function
Defined as
f(x_1, x_2) = - cos(x_1) * cos(x_2) * exp(-(x_1 - pi)^2 - (x_2 - pi)^2)
where x_i \in [-100, 100]
.
The global minimum is at f(x_1, x_2) = f(pi, pi) = -1
.