Fig. shows the sequence of hyperparameter pairs (ν i , γ i ) queried by BO as the search for the optimal pair (ν opt , γ opt ) proceeds, colored by the evaluated objective Λ(ν i , γ i ). As designed, BO automatically concentrates its samples of (ν, γ) in the region of hyperparameter space where the objective Λ(ν, γ) is the smallest.