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arXiv · 2001.03736

Each positive rational number has the form $\varphi(m^2)/\varphi(n^2)$

Dmitry Krachun·Zhi-Wei Sun
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Abstract

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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Dmitry Krachun, Zhi-Wei Sun. 2020-01-11. Each positive rational number has the form $\varphi(m^2)/\varphi(n^2)$. https://arxiv.org/abs/2001.03736

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