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    <h1>Bukin function N. 6</h1>
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    <p>Beside Bukin N. 2 and N. 4 this is the last &#8220;Bukin family&#8221; function.
It is given by the formula
$$f(\mathbf{x}) = 100 \sqrt{||\mathbf{x}_2 - 0.01 \mathbf{x}_1^2||} + 0.01 ||\mathbf{x}_1 + 10||$$
and the box constraints \(mathbf