In: Advanced Math
For any sequence (xn) of real numbers, we say that (xn) is increasing iff for all n, m ∈ N, if n < m, then xn < xm. Prove that any increasing sequence that is not Cauchy must be unbounded. (Here, “unbounded” just means that xn eventually gets larger than any given real number). Then, show that any increasing sequence that is bounded must converge