On an n-dimensional domain it is defined by
f(x) = _i=1^n [ -x_i(|x_i|) ],f(x) = sum_1^n [ -x_i*sin(sqrt(|x_i|) ],
and is usually evaluated on
x_i [ -500, 500 ]x_i in [-500, 500], for all
i=1,...,ni=1,...,n. The function has one global minimum at
f(x) = -418.9829nf(x) = -418.9829n for x_i=420.9687x_i=420.9687 for all i=1,...,ni=1,...,n.