Function argmin_testfunctions::cross_in_tray_derivative

pub fn cross_in_tray_derivative<T>(param: &[T; 2]) -> [T; 2]
where
    T: Float + Into<f64> + FromPrimitive,

Derivative of Cross-in-tray test function

Note: Even if the input parameters are f32, internal computations will be performed in f64.