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2022/100/1-2 (13) — DOI: 10.5486/PMD.2022.9133 — pp. 205-217

Density modulo 1 of some sequences associated to the functions $\varphi$ and $\sigma$

Authors: Mehdi Hassani and Mohammad Nasiri-Zare

Abstract:

For any polynomial $G$ with integral coefficients and taking positive values at positive arguments, we prove density modulo 1 of several sequences associated to the Euler and sum of divisors functions evaluated at $G$. More precisely, density modulo 1 of the following sequences with general terms: $\sum_{m\leq n}(\varphi(G(m))/G(m))^\ell$, $\sum_{m\leq n}(G(m)/\sigma(G(m)))^\ell$ and $\sum_{m\leq n}(\varphi(G(m))/\sigma(G(m)))^\ell$ for given $\ell>0$.

Keywords: Euler function, divisor function, distribution modulo 1, sieve method

Mathematics Subject Classification: 11K06, 11N36, 11N37