For the requirement of the second term a ∞ ≤ ϵ q , recalling (19), it goes to γ ≤ cϵ−2τ q qκ 2 .
introducing a real value β ≥ 1, we can set γ as γ = cϵ − 2τ q βqκ 2 (24) Note that, to make this formula meaningful, it is required that cϵ − 2τ q ≥ 0.