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In this paper, we obtain a q-exponential generating function for inversions on parking functions via symmetric function theory and also through a direct bijection to rooted labeled forests. We then apply these techniques to unit interval…

Parking functions of length $n$ are well known to be in correspondence with both labelled trees on $n+1$ vertices and factorizations of the full cycle $\sigma_n=(0\,1\,\cdots\,n)$ into $n$ transpositions. In fact, these correspondences can…

Combinatorics · Mathematics 2023-09-19 John Irving , Amarpreet Rattan

We introduce Lehmer parking functions and study their set of parking outcomes. Our main results establish that the number of outcomes of Lehmer parking functions of length $n$ is given by a Bell number, which is exactly the number of set…

In this paper, let $\mathcal{P}_{n,n+k;\leq n+k}$ (resp. $\mathcal{P}_{n;\leq s}$) denote the set of parking functions $\alpha=(a_1,...,a_n)$ of length $n$ with $n+k$ (respe. $n$)parking spaces satisfying $1\leq a_i\leq n+k$ (resp. $1\leq…

Combinatorics · Mathematics 2008-06-04 Po-Yi Huang , Jun Ma , Jean Yeh

We study the enumeration problem for different kind of tree parking functions introduced recently, called tree parking functions, tree parking distributions, prime tree parking functions, and prime tree parking distributions, for rooted…

Combinatorics · Mathematics 2020-07-30 Alois Panholzer

A pair $(G,K)$ of a group and its subgroup is called a Gelfand pair if the induced trivial representation of $K$ on $G$ is multiplicity free. Let $(a_j)$ be a sequence of positive integers of length $n$, and let $(b_i)$ be its…

Combinatorics · Mathematics 2010-09-28 Kürşat Aker , Mahir Bilen Can

We settle a conjecture of B\'ona regarding the log-concavity of a certain statistic on parking functions by utilizing recent log-concavity results on matroids. This result allows us to also prove that connected, labeled graphs graded by…

Combinatorics · Mathematics 2024-12-30 Joseph Pappe

We study subadditive functions of the random parking model previously analyzed by the second author. In particular, we consider local functions $S$ of subsets of $\mathbb{R}^d$ and of point sets that are (almost) subadditive in their first…

Probability · Mathematics 2015-06-04 Antoine Gloria , Mathew D. Penrose

Graphical parking functions, or $G$-parking functions, are a generalization of classical parking functions which depend on a connected multigraph $G$ having a distinguished root vertex. Gaydarov and Hopkins characterized the relationship…

Combinatorics · Mathematics 2025-09-19 Lauren Snider , Catherine Yan

We give a recursive definition of generalized parking function that allows us to view them as a species. From there we compute a non-commutative characteristic of the generalized parking function module, and deduce some enumeration formulas…

Combinatorics · Mathematics 2015-05-07 Jean-Baptiste Priez , Aladin Virmaux

Parking functions are a widely studied class of combinatorial objects, with connections to several branches of mathematics. On the algebraic side, parking functions can be identified with the standard monomials of $M_n$, a certain monomial…

Combinatorics · Mathematics 2021-08-27 Anton Dochtermann , Westin King

Naples parking functions were introduced as a generalization of classical parking functions, in which cars are allowed to park backwards, by checking up to a fixed number of previous spots, before proceeding forward as usual. In this work…

Combinatorics · Mathematics 2024-05-14 Luca Ferrari , Francesco Verciani

An $(m, n)$-parking function can be characterized as function $f:[n] \to [m]$ such that the partition obtained by reordering the values of $f$ fits inside a right triangle with legs of length $m$ and $n$. Recent work by McCammond, Thomas,…

Combinatorics · Mathematics 2025-03-04 Garrett Nelson

We recall that a parking function of length $n+1$ is said to be prime if removing any instance of 1 yields a parking function of length $n$. In this article, we study prime parking functions from multiple lenses. We derive an explicit…

Combinatorics · Mathematics 2026-01-29 Pamela E. Harris , Selvi Kara , Erin McNicholas , Kathryn Nyman , Mei Yin

There is a well-known bijection between parking functions of a fixed length and maximal chains of the noncrossing partition lattice which we can use to associate to each set of parking functions a poset whose Hasse diagram is the union of…

Combinatorics · Mathematics 2016-09-01 Melody Bruce , Michael Dougherty , Max Hlavacek , Ryo Kudo , Ian Nicolas

We construct an action of the braid group on $n$ strands on the set of parking functions of $n$ cars such that elementary braids have orbits of length 2 or 3. The construction is motivated by a theorem of Lyashko and Looijenga stating that…

Representation Theory · Mathematics 2013-09-23 Evgeny Gorsky , Mikhail Gorsky

This work builds on the notion of record of rooted trees. We provide an alternative definition of parking functions, derive from it a record-preserving bijection between rooted trees and parking functions, and establish a join…

Combinatorics · Mathematics 2026-03-31 Adrián Lillo , Mercedes Rosas , Stefan Trandafir

An m-ballot path of size n is a path on the square grid consisting of north and east unit steps, starting at (0,0), ending at (mn,n), and never going below the line {x=my. The set of these paths can be equipped with a lattice structure,…

Kreweras proved that the reversed sum enumerator for parking functions of length $n$ is equal to the inversion enumerator for labeled trees on $n+1$ vertices. Recently, Perkinson, Yang, and Yu gave a bijective proof of this equality that…

Combinatorics · Mathematics 2019-12-24 Petar Gaydarov , Sam Hopkins

In parking problems, a given number of cars enter a one-way street sequentially, and try to park according to a specified preferred spot in the street. Various models are possible depending on the chosen rule for collisions, when two cars…

Combinatorics · Mathematics 2024-01-05 Yujia Kang , Thomas Selig , Guanyi Yang , Yanting Zhang , Haoyue Zhu