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Two-dimensional test function based on the formula $$f(\mathbf{x}) = \sum_{i=1}^{20} \left[(x_1 + B_i x_2 + C_i x_2^2) - A_i\right]^2$$ with \(\mathbf{x}_1, \mathbf{x}_2 \in [-10, 10]\). For details on \(A, B, C\) see the referenced website.
makeJudgeFunction()
[smoof_single_objective_function]
smoof_single_objective_function
See https://al-roomi.org/benchmarks/unconstrained/2-dimensions/133-judge-s-function.