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The schwefel function of N variables for testing optimization methods. The global optima for the function is given by xi = 420.96874636, forall i E {1...N}, f(x) = 0. The range of xi is [-500,500]
f0.schwefel(...)
The function value
The variadic list of function variables.
http://deap.gel.ulaval.ca/doc/dev/api/benchmarks.html