The Shubert function has several local minima and many global minima. The second plot shows the the function on a smaller input domain, to allow for easier viewing.
Input Domain:The function is usually evaluated on the square xi ∈ [-10, 10], for all i = 1, 2, although this may be restricted to the square xi ∈ [-5.12, 5.12], for all i = 1, 2.
Global Optimization Test Problems. Retrieved June 2013, from
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