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Related papers: Some remarks on the lonely runner conjecture

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The lonely runner conjecture of Wills and Cusick asserts that if $n$ runners with distinct constant speeds run around a a circular unit length track, starting at a common time and place, then each runner will at some time be separated by a…

Combinatorics · Mathematics 2025-11-21 Benjamin Bedert

The Lonely Runner Conjecture of Wills and Cusick states that if $k+1$ runners start running at distinct constant speeds around a unit-length circular track, then for each runner there is a time when he/she is at least $1/(k+1)$ away from…

Combinatorics · Mathematics 2026-04-21 Tanupat Trakulthongchai

We introduce a sharpened version of the well-known Lonely Runner Conjecture of Wills and Cusick. Given a real number $x$, let $\Vert x \Vert$ denote the distance from $x$ to the nearest integer. For each set of positive integer speeds $v_1,…

Combinatorics · Mathematics 2019-12-13 Noah Kravitz

The Lonely Runner Conjecture was posed independently by Wills and Cusick and has many applications in different mathematical fields, such as diophantine approximation. This well-known conjecture states that for any set of runners running…

Combinatorics · Mathematics 2015-09-15 Guillem Perarnau , Oriol Serra

The Lonely Runner Conjecture asserts that if $n$ runners with distinct constant speeds run on the unit circle $\mathbb{R}/\mathbb{Z}$ starting from $0$ at time $0$, then each runner will at some time $t>0$ be lonely in the sense that she/he…

Combinatorics · Mathematics 2022-02-17 Ludovic Rifford

Suppose that $k$ runners having different constant speeds run laps on a circular track of unit length. The Lonely Runner Conjecture states that, sooner or later, any given runner will be at distance at least $1/k$ from all the other…

Combinatorics · Mathematics 2012-02-07 Sebastian Czerwiński

The Lonely Runner Conjecture states that if $k+1$ runners start at the same point on a unit-length circular track and run with distinct constant speeds, then each runner is at some time at least $1/(k+1)$-distant from every other runner.…

Number Theory · Mathematics 2026-05-28 Alathea Jensen

Wills conjectured that, for any non-zero integers $u_1,\ldots,u_k$, there is a real number $t$ such that, for all $i=1,\ldots,k$, \[\lVert tu_i\rVert\geq\frac{1}{k+1},\] where $\lVert x\rVert$ is the distance from $x$ to the closest…

Combinatorics · Mathematics 2026-04-28 Touch Sungkawichai , Tanupat Trakulthongchai

Suppose $k+1$ runners having nonzero constant speeds run laps on a unit-length circular track starting at the same time and place. A runner is said to be lonely if she is at distance at least $1/(k+1)$ along the track to every other runner.…

Combinatorics · Mathematics 2007-10-25 J. Barajas , O. Serra

The lonely runner conjecture, now over fifty years old, concerns the following problem. On a unit length circular track, consider $m$ runners starting at the same time and place, each runner having a different constant speed. The conjecture…

Number Theory · Mathematics 2019-04-17 Sam Chow , Luka Rimanic

Tao (2018) showed that in order to prove the Lonely Runner Conjecture (LRC) up to $n+1$ runners it suffices to consider positive integer velocities in the order of $n^{O(n^2)}$. Using the zonotopal reinterpretation of the conjecture due to…

Combinatorics · Mathematics 2025-10-03 Romanos Diogenes Malikiosis , Francisco Santos , Matthias Schymura

Let $||x||$ be the absolute distance from $x$ to the nearest integer. For a set of distinct positive integral speeds $v_1, \ldots, v_n$, we define its maximum loneliness, also known as the gap $\delta$, to be $$ML(v_1,\ldots,v_n) = \max_{t…

Number Theory · Mathematics 2026-05-06 Ho Tin Fan , Alec Sun

We study the \emph{Lonely Runner Conjecture}, conceived by J\"org M.~Wills in the 1960's: Given positive integers $n_1, n_2, \dots, n_k$, there exists a positive real number $t$ such that for all $1 \le j \le k$ the distance of $t \, n_j$…

Combinatorics · Mathematics 2020-01-01 Matthias Beck , Serkan Hosten , Matthias Schymura

In this paper, we study the distribution of the boundary points of expansion. As an application, we say something about the lonely runner problem. We show that given $k$ runners $\mathcal{S}_i$ round a unit circular track with the condition…

Combinatorics · Mathematics 2026-03-12 Theophilus Agama

We consider (n+1) runners with given constant unique integer speeds running along the circumference of a circle whose circumferential length is one, and all runners starting from the same point. We define and give lower bounds to a first…

Computational Geometry · Computer Science 2020-01-20 Deepak Ponvel Chermakani

We prove that the lonely runner conjecture holds for eight runners. Our proof relies on a computer verification and on recent results that allow bounding the size of a minimal counterexample. We note that our approach also applies to the…

Combinatorics · Mathematics 2025-10-17 Matthieu Rosenfeld

We prove that the lonely runner conjecture holds for nine runners. Our proof is based on a couple of improvements of the method we used to prove the conjecture for eight runners.

Discrete Mathematics · Computer Science 2026-01-28 Matthieu Rosenfeld

The Lonely Runner Conjecture is a number theory problem, dating to 1964. Using dynamical systems theory, we show almost all sets of velocities solve the conjecture. Furthermore, any "traditional" approach of Diophantine approximation cannot…

Number Theory · Mathematics 2011-03-10 C. Harold Horvat , Matthew Stoffregen

Consider the circle $C$ of length 1 and a circular arc $A$ of length $\ell\in (0,1)$. It is shown that there exists $k=k(\ell) \in \mathbb{N}$, and a schedule for $k$ runners along the circle with $k$ constant but distinct positive speeds…

Combinatorics · Mathematics 2017-11-06 Adrian Dumitrescu , Csaba D. Tóth

We show that the shifted Lonely Runner Conjecture (sLRC) holds for 5 runners. We also determine that there are exactly 3 primitive tight instances of the conjecture, only two of which are tight for the non-shifted conjecture (LRC). Our…

Combinatorics · Mathematics 2026-05-11 David Alcántara , Francisco Criado , Francisco Santos
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