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Dec 2, 2016 at 13:15 history closed Alexey Ustinov
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Duplicate of distribution of coprime integers
Dec 2, 2016 at 13:13 review Close votes
Dec 2, 2016 at 13:24
Dec 2, 2016 at 12:46 vote accept Xueyi Huang
Dec 2, 2016 at 10:33 answer added Igor Rivin timeline score: 1
Dec 2, 2016 at 10:29 comment added KConrad You should say what kind of "formula" you want. The rule of being $< a$ and relatively prime to $n$ without any relation between $a$ and $n$ other than $a \leq n$ is not going to make $\varphi(n,a)$ into a nice function (e.g., usually not multiplicative in $n$). Do you have any basis for believing there should be a nice formula of some kind?
Dec 2, 2016 at 9:34 history edited Xueyi Huang
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Dec 2, 2016 at 9:28 history asked Xueyi Huang CC BY-SA 3.0