Description

Builds and returns the bi-objective Dent test problem, which is defined as follows:

f(\mathbf{x}) = ≤ft(f_1(\mathbf{x}_1), f_2(\mathbf{x})\right)

with

f_1(\mathbf{x}_1) = 0.5 ≤ft( √(1 + (x_1 + x_2)^2) + √(1 + (x_1 - x_2)^2) + x_1 - x_2\right) + d

and

f_1(\mathbf{x}_1) = 0.5 ≤ft( √(1 + (x_1 + x_2)^2) + √(1 + (x_1 - x_2)^2) - x_1 + x_2\right) + d

where d = λ * \exp(-(x_1 - x_2)^2) and \mathbf{x}_i \in [-1.5, 1.5], i = 1, 2.

Usage

Value

[smoof_multi_objective_function]