On the representation of rational numbers via Euler's totient function

Weilin Zhang, Fengyuan Chen, Hongjian Li +1

Let $b>1$ be an odd positive integer and $k,l\in \mathbb{N}$. In this paper, we show that every positive rational number can be written as $\phi (m^2)/(\phi (n^2){)}^b$ and $φ(k(m^{2…