On extreme values of $r_3(n)$ in arithmetic progressions

Fuente: arXiv
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Main Authors: Filaseta, Michael, Klein, Jonah, Sabuncu, Cihan
Format: Preprint
Published: 2024
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author Filaseta, Michael
Klein, Jonah
Sabuncu, Cihan
author_facet Filaseta, Michael
Klein, Jonah
Sabuncu, Cihan
contents For a given integer $m$ and any residue $a \pmod{m}$ that can be written as a sum of 3 squares modulo $m$, we show the existence of infinitely many integers $n \equiv a \pmod{m}$ such that the number of representations of $n$ as a sum of three squares, $r_3(n)$, satisfies $r_3(n) \gg_m \sqrt{n} \log \log n$. Consequently, we establish that there are infinitely many integers $n \equiv a \pmod{m}$ for which the Hurwitz class number $H(n)$ also satisfies $H(n) \gg_m \sqrt{n} \log \log n$.
format Preprint
id arxiv_https___arxiv_org_abs_2412_01988
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle On extreme values of $r_3(n)$ in arithmetic progressions
Filaseta, Michael
Klein, Jonah
Sabuncu, Cihan
Number Theory
11E25(Primary) 11E20, 11N37 (Secondary)
For a given integer $m$ and any residue $a \pmod{m}$ that can be written as a sum of 3 squares modulo $m$, we show the existence of infinitely many integers $n \equiv a \pmod{m}$ such that the number of representations of $n$ as a sum of three squares, $r_3(n)$, satisfies $r_3(n) \gg_m \sqrt{n} \log \log n$. Consequently, we establish that there are infinitely many integers $n \equiv a \pmod{m}$ for which the Hurwitz class number $H(n)$ also satisfies $H(n) \gg_m \sqrt{n} \log \log n$.
title On extreme values of $r_3(n)$ in arithmetic progressions
topic Number Theory
11E25(Primary) 11E20, 11N37 (Secondary)
url https://arxiv.org/abs/2412.01988