“…[7] Let R be a Noetherian ring and s be an element of R such that S s := {si | i ∈ N}is a left denominator set of the ring R and (s i ) = (s) i for all i 1 (e.g., s is a normal element such that ker(•s R ) ⊆ ker(s R •)). Then Spec (R) = Spec(R, s) ⊔ Spec s (R) where Spec(R, s) := {p ∈ Spec (R) | s ∈ p}, Spec s (R) := {q ∈ Spec (R) | s / ∈ q} and (a) the map Spec(R, s) → Spec (R/(s)), p → p/(s), is a bijection with inverse q → π −1 (q) where π : R → R/(s), r → r + (s), (b) the map Spec s…”