Farey fractions with equal numerators and the rank of unit fractions

Fuente: arXiv
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Auteur principal: Garcia, Rogelio Tomas
Format: Preprint
Publié: 2024
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author Garcia, Rogelio Tomas
author_facet Garcia, Rogelio Tomas
contents Analytical expressions are derived for the number of fractions with equal numerators in the Farey sequence of order $n$, $F_n$, and in the truncated Farey sequence $F_n^{1/k}$ containing all Farey fractions below $1/k$, with $1\leq k \leq n$. These developments lead to an expression for the rank of $1/k$ in $F_n$, or equivalently $\left|F_n^{1/k}\right|$, and to remarkable relations between the ranks of different unit fractions. Furthermore, the results are extended to Farey fractions of the form $2/k$.
format Preprint
id arxiv_https___arxiv_org_abs_2404_08283
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle Farey fractions with equal numerators and the rank of unit fractions
Garcia, Rogelio Tomas
Number Theory
Analytical expressions are derived for the number of fractions with equal numerators in the Farey sequence of order $n$, $F_n$, and in the truncated Farey sequence $F_n^{1/k}$ containing all Farey fractions below $1/k$, with $1\leq k \leq n$. These developments lead to an expression for the rank of $1/k$ in $F_n$, or equivalently $\left|F_n^{1/k}\right|$, and to remarkable relations between the ranks of different unit fractions. Furthermore, the results are extended to Farey fractions of the form $2/k$.
title Farey fractions with equal numerators and the rank of unit fractions
topic Number Theory
url https://arxiv.org/abs/2404.08283