Volume 27, Issue 2 (2020)

On the Divisibility of Character Values of the Symmetric Group

Jyotirmoy Ganguly, Amritanshu Prasad, Steven Spallone

P2.1
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Homomorphisms of Cayley graphs and Cycle Double Covers

Radek Hušek, Robert Šámal

P2.2
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Bijections between Łukasiewicz Walks and Generalized Tandem Walks

Frédéric Chyzak, Karen Yeats

P2.3
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A Lower Bound on the Average Degree Forcing a Minor

Sergey Norin, Bruce Reed, Andrew Thomason, David R. Wood

P2.4
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Counting Realizations of Laman Graphs on the Sphere

Matteo Gallet, Georg Grasegger, Josef Schicho

P2.5
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On Cyclic Schur-Positive Sets of Permutations

Jonathan Bloom, Sergi Elizalde, Yuval Roichman

P2.6
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Supertrees

Colin Defant, Noah Kravitz, Ashwin Sah

P2.7
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Infinite Monochromatic Paths and a Theorem of Erdős-Hajnal-Rado

Shimon Garti, Menachem Magidor, Saharon Shelah

P2.8
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Flag-Transitive Non-Symmetric 2-Designs with $(r, \lambda)=1$ and Exceptional Groups of Lie Type

Yongli Zhang, Shenglin Zhou

P2.9
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Bijections between Directed Animals, Multisets and Grand-Dyck Paths

Jean-Luc Baril, David Bevan, Sergey Kirgizov

P2.10
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Randomly Weighted $d$-Complexes: Minimal Spanning Acycles and Persistence Diagrams

Primoz Skraba, Gugan Thoppe, D. Yogeshwaran

P2.11
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On the Discrepancies of Graphs

József Balogh, Béla Csaba, Yifan Jing, András Pluhár

P2.12
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Twenty-Vertex Model with Domain Wall Boundaries and Domino Tilings

Philippe Di Francesco, Emmanuel Guitter

P2.13
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Minimum Supports of Eigenfunctions with the Second Largest Eigenvalue of the Star Graph

Vladislav Kabanov, Elena V. Konstantinova, Leonid Shalaginov, Alexandr Valyuzhenich

P2.14
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A Graph-Theoretic Approach to Wilf's Conjecture

Shalom Eliahou

P2.15
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3-Uniform Hypergraphs without a Cycle of Length Five

Beka Ergemlidze, Ervin Győri, Abhishek Methuku

P2.16
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Favourite Distances in $3$-Space

Konrad J. Swanepoel

P2.17
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Erdős–Ko–Rado Theorem for a Restricted Universe

Peter Frankl

P2.18
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Quantum Discrepancy: A Non-Commutative Version of Combinatorial Discrepancy

Kasra Alishahi, Mohaddeseh Rajaee, Ali Rajaei

P2.19
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Some Families of Trees Arising in Permutation Analysis

Mathilde Bouvel, Marni Mishna, Cyril Nicaud

P2.20
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Commutation Classes of the Reduced Words for the Longest Element of ${\mathfrak S}_n$

Gonçalo Gutierres, Ricardo Mamede, José Luis Santos

P2.21
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On Linearization Coefficients of $q$-Laguerre Polynomials

Byung-Hak Hwang, Jang Soo Kim, Jaeseong Oh, Sang-Hoon Yu

P2.22
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Honeycombs for Hall Polynomials

Paul Zinn-Justin

P2.23
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Asymptotics of a Locally Dependent Statistic on Finite Reflection Groups

Frank Röttger

P2.24
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Locally Hamiltonian Graphs and Minimal Size of Maximal Graphs on a Surface

James Davies, Carsten Thomassen

P2.25
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A Note on Norine's Antipodal-Colouring Conjecture

Vojtěch Dvořák

P2.26
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The 2-Factor Polynomial Detects Even Perfect Matchings

Scott Baldridge, Adam M. Lowrance, Ben McCarty

P2.27
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Perfect State Transfer on Cayley Graphs over Dihedral Groups: The Non-Normal Case

Xiwang Cao, Bocong Chen, San Ling

P2.28
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A Crystal on Decreasing Factorizations in the 0-Hecke Monoid

Jennifer Morse, Jianping Pan, Wencin Poh, Anne Schilling

P2.29
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Spectrum of Signless 1-Laplacian on Simplicial Complexes

Xin Luo, Dong Zhang

P2.30
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Improved Bounds for Induced Poset Saturation

Ryan R. Martin, Heather C. Smith, Shanise Walker

P2.31
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On Absolute Points of Correlations of $\mathrm{PG}(2,q^n)$

Jozefien D'haeseleer, Nicola Durante

P2.32
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Structural Results for Conditionally Intersecting Families and some Applications

Xizhi Liu

P2.33
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Bipartite Induced Density in Triangle-Free Graphs

Wouter Cames van Batenburg, Rémi de Joannis de Verclos, Ross J. Kang, François Pirot

P2.34
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On Density-Critical Matroids

Rutger Campbell, Kevin Grace, James Oxley, Geoff Whittle

P2.35
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Periodic Triangulations of $\mathbb{Z}^n$

Mathieu Dutour Sikirić, Alexey Garber

P2.36
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Minimum Degree Conditions for Small Percolating Sets in Bootstrap Percolation

Karen Gunderson

P2.37
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Homomorphisms into Loop-Threshold Graphs

Jonathan Cutler, Nicholas Kass

P2.38
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On Berge-Ramsey Problems

Dániel Gerbner

P2.39
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Complete Acyclic Colorings

Stefan Felsner, Winfried Hochstättler, Kolja Knauer, Raphael Steiner

P2.40
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Minimal Cellular Resolutions of the Edge Ideals of Forests

Margherita Barile, Antonio Macchia

P2.41
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Unified Characterizations of Minuscule Kac–Moody Representations Built from Colored Posets

Michael C. Strayer

P2.42
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Geometric Realization of $\gamma$-Vectors of Subdivided Cross Polytopes

Natalie Aisbett, Vadim Volodin

P2.43
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Enumerating Parking Completions Using Join and Split

Ayomikun Adeniran, Steve Butler, Galen Dorpalen-Barry, Pamela E. Harris, Cyrus Hettle, Qingzhong Liang, Jeremy L. Martin, Hayan Nam

P2.44
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Normal Limit Laws for Vertex Degrees in Randomly Grown Hooking Networks and Bipolar Networks

Colin Desmarais, Cecilia Holmgren

P2.45
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Polyurethane Toggles

Colin Defant

P2.46
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Enumerating Partial Latin Rectangles

Raúl M. Falcón, Rebecca J. Stones

P2.47
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Parking Functions on Directed Graphs and Some Directed Trees

Westin King, Catherine H. Yan

P2.48
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Constructing Isostatic Frameworks for the $\ell^1$ and $\ell^\infty$ Plane

Katie Clinch, Derek Kitson

P2.49
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Deformation of Cayley's Hyperdeterminants

Tommy Wuxing Cai, Naihuan Jing

P2.50
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Abstract Tropical Linear Programming

Georg Loho

P2.51
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Lichiardopol’s Conjecture on Disjoint Cycles in Tournaments

Fuhong Ma, Douglas B. West, Jin Yan

P2.52
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Combinatorics of the 2-Species Exclusion Processes, Marked Laguerre Histories, and Partially Signed Permutations

Sylvie Corteel, Arthur Nunge

P2.53
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A Note on the Hurwitz Action on Reflection Factorizations of Coxeter Elements in Complex Reflection Groups

Joel Brewster Lewis

P2.54
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A Toeplitz Property of Ballot Permutations and Odd Order Permutations

David G.L. Wang, Jerry J.R. Zhang

P2.55
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Extremal Topological and Geometric Problems for Polyominoes

Greg Malen, Erika Berenice Roldan-Roa

P2.56
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Inhomogeneous Partition Regularity

Imre Leader, Paul A. Russell

P2.57
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Coefficients of Gaussian Polynomials Modulo $N$

Dylan Pentland

P2.58
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