Each positive rational number has the form $φ(m^2)/φ(n^2)$
英文摘要：
In this note, we show that each positive rational number can be written as $φ(m^2)/φ(n^2)$, where $φ$ is Euler's totient function and $m$ and $n$ are positive integers.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
