Description

Two-dimensional test function based on the formula

f(\mathbf{x}) = (x_1^2 + x_2^2 - 2)^2 + (x_1^2 - x_2^2 - 1)^2

with \mathbf{x}_1, \mathbf{x}_2 \in [-3, 4].

Usage

Value

[smoof_single_objective_function]

References

See http://al-roomi.org/benchmarks/unconstrained/2-dimensions/59-kearfott-s-function.