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Relative-totient function (2nd attempt)

I will not comment on the soundness of the approach, but I will render a subjective opinion: I don't like it. One of the reasons is that I have found most people do not have a good understanding of …
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1 vote

The number of totatives to the nth primorial, in an interval shorter than the nth primorial

Since I haven't posted this construction on MathOverflow (only referred to an ArXiv posting at Erik Westzynthius's cool upper bound argument: update? ), let me show that one can have intervals of th …
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