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We present combinatorial bijections and identities between certain skew Young tableaux, Dyck paths, triangulations, and dissections.

Combinatorics · Mathematics 2022-09-20 Su Ji Hong , George D. Nasr

For a natural class of $r \times n$ integer matrices, we construct a non-convex polytope which periodically tiles $\mathbb R^n$. From this tiling, we provide a family of geometrically meaningful maps from a generalized sandpile group to a…

Combinatorics · Mathematics 2022-03-30 Alex McDonough

In this paper we introduce a new bijection from the set of Dyck paths to itself. This bijection has the property that it maps statistics that appeared recently in the study of pattern-avoiding permutations into classical statistics on Dyck…

Combinatorics · Mathematics 2007-05-23 Sergi Elizalde , Emeric Deutsch

We derive a simple bijection between geometric plane perfect matchings on $2n$ points in convex position and triangulations on $n+2$ points in convex position. We then extend this bijection to monochromatic plane perfect matchings on…

Combinatorics · Mathematics 2018-07-16 Oswin Aichholzer , Lukas Andritsch , Karin Baur , Birgit Vogtenhuber

We present a bijection between some quadrangular dissections of an hexagon and unrooted binary trees, with interesting consequences for enumeration, mesh compression and graph sampling. Our bijection yields an efficient uniform random…

Combinatorics · Mathematics 2008-10-21 Eric Fusy , Dominique Poulalhon , Gilles Schaeffer

We consider planar maps with three boundaries, colloquially called pairs of pants. In the case of bipartite maps with controlled face degrees, a simple expression for their generating function was found by Eynard and proved bijectively by…

Combinatorics · Mathematics 2022-11-28 Jérémie Bouttier , Emmanuel Guitter , Grégory Miermont

Plane perfect matchings of $2n$ points in convex position are in bijection with triangulations of convex polygons of size $n+2$. Edge flips are a classic operation to perform local changes both structures have in common. In this work, we…

Combinatorics · Mathematics 2019-07-23 Oswin Aichholzer , Lukas Andritsch , Karin Baur , Birgit Vogtenhuber

We offer streamlined proofs of fundamental theorems regarding the index theory for partial self-maps of an infinite set that are bijective between cofinite subsets.

Combinatorics · Mathematics 2015-10-09 P. L. Robinson

We give a bijective proof of a conjecture of Regev and Vershik on the equality of two multisets of hook numbers of certain skew-Young diagrams. The bijection proves a result that is stronger and more symmetric than the original conjecture,…

Combinatorics · Mathematics 2011-10-19 Ian Goulden , Alexander Yong

This paper contains a description of a connection between the matching arrangement and the matching polyhedron. A bijection between regions of the matching arragement and LP-orientations of the matching polyhedron is constructed. This…

Combinatorics · Mathematics 2022-12-29 Aleksey Bolotnikov

We provide new Schmidt-type results through an investigation of two bijections, which are results involving partitions with parts counted only at given indices. Mork's bijection, the first of these, was originally given as a proof of…

Combinatorics · Mathematics 2022-10-17 Hunter Waldron

For stacked simplicial complexes, (special subclasses of such are: trees, triangulations of polygons, stacked polytopes), we give an explicit bijection between partitions of facets (for trees: edges), and partitions of vertices into…

Combinatorics · Mathematics 2024-01-17 Gunnar Fløystad

We develop a new bijective framework for the enumeration of bipartite planar maps with control on the degree distribution of black and white vertices. Our approach builds on the blossoming-tree paradigm, introducing a family of orientations…

Combinatorics · Mathematics 2025-11-07 Marie Albenque , Laurent Ménard , Nicolas Tokka

We give a bijective correspondence between the number of nilpotent matrices over a Boolean semiring and the number of directed acyclic graphs on ordered vertices. We then enumerate pairs of maps between two finite sets whose composites are…

Combinatorics · Mathematics 2025-12-08 Weixi Chen , Mee Seong Im , Catherine Lillja , Nicolas Rugo

We present a direct bijection between descending plane partitions with no special parts and permutation matrices. This bijection has the desirable property that the number of parts of the descending plane partition corresponds to the…

Combinatorics · Mathematics 2012-07-26 Jessica Striker

We present a simple bijection between permutation matrices and descending plane partitions without special parts. This bijection is already mentioned in work of P. Lalonde (without giving the details); it involves the inversion words of…

Combinatorics · Mathematics 2017-03-08 Markus Fulmek

It is well-known that plane partitions, lozenge tilings of a hexagon, perfect matchings on a honeycomb graph, and families of non-intersecting lattice paths in a hexagon are all in bijection. In this work we consider regions that are more…

Combinatorics · Mathematics 2015-07-10 David Cook , Uwe Nagel

The slice decomposition is a bijective method for enumerating planar maps (graphs embedded in the sphere) with control over face degrees. In this paper, we extend the slice decomposition to the richer setting of hypermaps, naturally…

Combinatorics · Mathematics 2026-04-29 Marie Albenque , Jérémie Bouttier

Using techniques introduced by H. Thomas and N. Williams in "Cyclic Symmetry of the Scaled Simplex," we prove that modular sweep maps are bijective. We construct the inverse of the modular sweep map by passing through an intermediary set of…

Combinatorics · Mathematics 2018-02-28 Hugh Thomas , Nathan Williams

There is a natural bijection between Dyck paths and basis diagrams of the Temperley-Lieb algebra defined via tiling. Overhang paths are certain generalisations of Dyck paths allowing more general steps but restricted to a rectangle in the…

Combinatorics · Mathematics 2020-12-21 Bethany Marsh , Paul Martin