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Is the probability that n and phi(n) (totient function) are coprime one for random squarefree n?

apr 16 12 at 21:14 Ravi Shankar 11●1

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The Vanishing of Ramanujan’s Function tau(n)

jul 22 10 at 7:31 Bruce Westbury 6,645●2●10●25

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Non-English language Mathematical podcasts/audio

aug 9 10 at 7:14 Derek Jennings 313●1●8

 
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On the constants in the Cameron-Erdös conjecture on sum-free subsets.

aug 11 10 at 4:51 Gerry Myerson 15.7k●1●47●87