Description

Two-dimensional test function based on the formula

f(\mathbf{x}) = 0.25 x_1^4 - 0.5 x_1^2 + 0.1 x_1 + 0.5 x_2^2

with \mathbf{x}_1, \mathbf{x}_2 \in [-10, 10].

Usage

Value

[smoof_single_objective_function]

Note

This functions is also know as the Zirilli function.

References

See http://al-roomi.org/benchmarks/unconstrained/2-dimensions/26-aluffi-pentini-s-or-zirilli-s-function.