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Corrected Schaffer function n°4 ... see http://infinity77.net/global_optimization/test_functions_nd_S.html |
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| Schaffer function N. 4:
|| [[File:Schaffer function 4.pdf|200px|Schaffer function N.4]]
|| <math>f(x,y) = 0.5 + \frac{\cos^{2}\left(\sin \left( \left|x^{2} - y^{2}\right|\right)\right) - 0.5}{\left(1 + 0.001\left(x^{2} + y^{2}\right) \right)^{2}}</math>
|| <math>f(0,1.25313) = 0.292579</math>
|| <math>-100\le x,y \le 100</math>
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