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We introduce parking assortments, a generalization of parking functions with cars of assorted lengths. In this setting, there are $n\in\mathbb{N}$ cars of lengths $\mathbf{y}=(y_1,y_2,\ldots,y_n)\in\mathbb{N}^n$ entering a one-way street…

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

A parking function is a function $\pi:[n]\to [n]$ whose $i$th-smallest output is at most $i,$ corresponding to a parking procedure for $n$ cars on a one-way street. We refine this concept by introducing preference-restricted parking…

Combinatorics · Mathematics 2025-07-17 Jasper Bown , Peter Kagey , Alan Kappler , Michael E. Orrison , Jayden Thadani

The conceptions of $G$-parking functions and $G$-multiparking functions were introduced in [15] and [12] respectively. In this paper, let $G$ be a connected graph with vertex set $\{1,2,...,n\}$ and $m\in V(G)$. We give the definition of…

Combinatorics · Mathematics 2008-10-23 Hungyung Chang , Po-Yi Huang , Jun Ma , Yeong-Nan Yeh

Parking functions were classically defined for $n$ cars attempting to park on a one-way street with $n$ parking spots, where cars only drive forward. Subsequently, parking functions have been generalized in various ways, including allowing…

Combinatorics · Mathematics 2022-07-08 Roger Tian

We consider the inversion enumerator I_n(q), which counts labeled trees or, equivalently, parking functions. This polynomial has a natural extension to generalized parking functions. Substituting q = -1 into this generalized polynomial…

Combinatorics · Mathematics 2008-06-04 Denis Chebikin , Alexander Postnikov

Consider $n$ cars $C_1, C_2, \ldots, C_n$ that want to park in a parking lot with parking spaces $1,2,\ldots,n$ that appear in order. Each car $C_i$ has a parking preference $\alpha_i \in \{1,2,\ldots,n\}$. The cars appear in order, if…

Combinatorics · Mathematics 2021-11-29 Melanie Tian , Enrique Treviño

The notion of parking sequences is a new generalization of parking functions introduced by Ehrenborg and Happ. In the parking process defining the classical parking functions, instead of each car only taking one parking space, we allow the…

Combinatorics · Mathematics 2020-07-21 Ayomikun Adeniran , Catherine Yan

In a parking function, a car is considered lucky if it is able to park in its preferred spot. Extending work of Harris and Martinez, we enumerate outcomes of parking functions with a fixed set of lucky cars. We then consider a…

Combinatorics · Mathematics 2025-09-11 Melanie Ferreri , Pamela E. Harris , Lucy Martinez , Eric Swartz

We introduce a generalization of parking functions in which cars are limited in their movement backwards and forwards by two nonnegative integer parameters $k$ and $\ell$, respectively. In this setting, there are $n$ spots on a one-way…

Combinatorics · Mathematics 2025-03-24 Jennifer Elder , Pamela E. Harris , Lybitina Koene , Ilana Lavene , Lucy Martinez , Molly Oldham

A permutation of length $n$ is called a flattened partition if the leading terms of maximal chains of ascents (called runs) are in increasing order. We analogously define flattened parking functions: a subset of parking functions for which…

Combinatorics · Mathematics 2023-06-13 Jennifer Elder , Pamela E. Harris , Zoe Markman , Izah Tahir , Amanda Verga

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

This paper provides an exploration of parking functions, a classical combinatorial object. We present two viewpoints on their structure and properties: through poset of noncrossing partitions and polytopes.

History and Overview · Mathematics 2024-12-17 Yan Liu

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

Recent results have placed the classical shuffle conjecture of Haglund et al. in a broader context of an infinite family of conjectures about parking functions in any rectangular lattice. The combinatorial side of the new conjectures has…

Combinatorics · Mathematics 2014-08-01 Angela Hicks , Emily Leven

Interval parking functions are a generalization of parking functions in which cars have an interval preference for their parking. We generalize this definition to parking functions with $n$ cars and $m\geq n$ parking spots, which we call…

In this paper, we view parking functions viewed as labeled Dyck paths in order to study a notion of pattern avoidance first introduced by Remmel and Qiu. In particular we enumerate the parking functions avoiding any set of two or more…

Combinatorics · Mathematics 2023-01-30 Ayomikun Adeniran , Lara Pudwell

We study Schroder paths drawn in a (m,n) rectangle, for any positive integers m and n. We get explicit enumeration formulas, closely linked to those for the corresponding (m,n)-Dyck paths. Moreover we study a Schroder version of…

Combinatorics · Mathematics 2016-04-01 Jean-Christophe Aval , Francois Bergeron

In a parking function, a lucky car is a car that parks in its preferred parking spot and the parking outcome is the permutation encoding the order in which the cars park on the street. We give a characterization for the set of parking…

Combinatorics · Mathematics 2024-12-11 Pamela E. Harris , Lucy Martinez

A parking function on $[n]$ creates a permutation in $S_n$ via the order in which the $n$ cars appear in the $n$ parking spaces. Placing the uniform probability measure on the set of parking functions on $[n]$ induces a probability measure…

Probability · Mathematics 2024-06-19 Ross G. Pinsky