// Strategie evolutiva: functie test multi-modala (multe minime locale)
function y=SE_f2(x)
    n=size(x,2);
    s=0;p=1;
    for j=1:n
        s=s+x(j)^2;
        p=p*cos(x(j)/sqrt(j));   
    end   
    y=s/4000-p+1;
endfunction
