Let t ∈ [0,1] and t / ∈ Im(µ) and if t ≤ t1 then µt1= µt or if ti−1 ≤ t ≤ ti, then by theorem 3.5 µt= µti or if t ≥ tn then µt is empty and therefore µt is one of the member of the family of β−subalgebras {µti,1 ≤ i ≤ n}, proving that {µti,1 ≤ i ≤ n} will be the entire level β−subalgebras of X.