Each positive rational number has the form $\varphi(m^2)/\varphi(n^2)$
arXiv (Cornell University)(2020)
摘要
In this note, we show that each positive rational number can be written as $\varphi(m^2)/\varphi(n^2)$, where $\varphi$ is Euler's totient function and $m$ and $n$ are positive integers.
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关键词
positive rational number
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