Let Prove that (a) if exists, then sup (A) = inf {u: u is an upper bound of A}.(b) if
Chapter 7, Problem 13(choose chapter or problem)
Let Prove that (a) if exists, then sup (A) = inf {u: u is an upper bound of A}.(b) if exists, then inf (A) = sup{l: l is a lower bound of A}.
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