Challenge problem: Let f be a function : Prove that: If, a, is not an accumulation point of A,then there exists an mεR,such that for all ε>0 there exists a δ>0 such that : for all ,x: and Moderator edit: Approved Challenge question.
Last edited by mr fantastic; June 28th 2010 at 04:22 PM. Reason: Approved.
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