a 6-dimensional vector specifying the location where the function is to be evaluated.
Value
A real number equal to the hartman6 function values at x
Details
The hartman6 function is defined over the domain [0,1]^6. It has 1 global minimum :
x1 = c(0.20168952, 0.15001069, 0.47687398, 0.27533243, 0.31165162, 0.65730054)