Volume 28, Issue 2 (2021)

A Vertex-Weighted Tutte Symmetric Function, and Constructing Graphs with Equal Chromatic Symmetric Function

José Aliste-Prieto, Logan Crew, Sophie Spirkl, José Zamora

P2.1
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Prolific Permutations

Michael Albert, Murray Tannock

P2.2
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A Note on Transitive Union-Closed Families

James Aaronson, David Ellis, Imre Leader

P2.3
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Forbidding $K_{2,t}$ Traces in Triple Systems

Ruth Luo, Sam Spiro

P2.4
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Algorithmically Distinguishing Irreducible Characters of the Symmetric Group

Timothy Y. Chow, Jennifer Paulhus

P2.5
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Bijections Between Walks Inside a Triangular Domain and Motzkin Paths of Bounded Amplitude

Julien Courtiel, Andrew Elvey Price, Irène Marcovici

P2.6
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Almost Intersecting Families

Peter Frankl, Andrey Kupavskii

P2.7
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Restricted Extension of Sparse Partial Edge Colorings of Complete graphs

Carl Johan Casselgren, Lan Anh Pham

P2.8
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The Erdős-Hajnal Property for Graphs with No Fixed Cycle as a Pivot-Minor

Jaehoon Kim, Sang-il Oum

P2.9
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Ramsey Theory for Layered Semigroups

Jordan Mitchell Barrett

P2.10
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Vertex Colouring Edge Weightings: a Logarithmic Upper Bound on Weight-Choosability

Kasper Szabo Lyngsie, Liang Zhong

P2.11
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Grundy Domination of Forests and the Strong Product Conjecture

Kayla Bell, Keith Driscoll, Elliot Krop, Kimber Wolff

P2.12
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Almost Simple Groups of Lie Type and Symmetric Designs with $\lambda$ Prime

Seyed Hassan Alavi, Mohsen Bayat, Ashraf Daneshkhah

P2.13
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Coloring Problems on Bipartite Graphs of Small Diameter

Victor A. Campos, Guilherme C.M. Gomes, Allen Ibiapina, Raul Lopes, Ignasi Sau, Ana Silva

P2.14
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The Top-Degree Part in the Matchings-Jack Conjecture

Adam Burchardt

P2.15
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Almost all Permutation Matrices have Bounded Saturation Functions

Jesse Geneson

P2.16
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A Note on Complex-4-Colorability of Signed Planar Graphs

Arnfried Kemnitz, Margit Voigt

P2.17
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The Graham–Knuth–Patashnik Recurrence: Symmetries and Continued Fractions

Jesús Salas, Alan D. Sokal

P2.18
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- Supplementary material
Characters and Chromatic Symmetric Functions

Mark Skandera

P2.19
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Square-Free Graphs with no Induced Fork

Maria Chudnovsky, Shenwei Huang, T. Karthick, Jenny Kaufmann

P2.20
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Two Maps on Affine Type $A$ Crystals and Hecke Algebras

Nicolas Jacon

P2.21
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On the Sizes of Bipartite 1-Planar Graphs

Yuanqiu Huang, Zhangdong Ouyang, Fengming Dong

P2.22
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A Note on the Erdős-Szekeres Theorem in Two Dimensions

Lyuben Lichev

P2.23
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Answers to Two Questions on the DP Color Function

Jeffrey A. Mudrock, Seth Thomason

P2.24
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Diameter Three Orientability of Bipartite Graphs

Bin Chen, An Chang

P2.25
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Random Perturbation of Sparse Graphs

Max Hahn-Klimroth, Giulia S. Maesaka, Yannick Mogge, Samuel Mohr, Olaf Parczyk

P2.26
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Extension of Gyárfás-Sumner Conjecture to Digraphs

Pierre Aboulker, Pierre Charbit, Reza Naserasr

P2.27
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Rank Selection and Depth Conditions for Balanced Simplicial Complexes

Brent Holmes, Justin Lyle

P2.28
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Symplectic Keys and Demazure Atoms in Type C

João Miguel Santos

P2.29
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Norton Algebras of the Hamming Graphs via Linear Characters

Jia Huang

P2.30
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Majority Colorings of Sparse Digraphs

Michael Anastos, Ander Lamaison, Raphael Steiner, Tibor Szabó

P2.31
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Squarefree Powers of Edge Ideals of Forests

Nursel Erey, Takayuki Hibi

P2.32
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Betti Numbers of Weighted Oriented Graphs

Beata Casiday, Selvi Kara

P2.33
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A Subexponential Upper Bound for van der Waerden Numbers $W(3,k)$

Tomasz Schoen

P2.34
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Tomaszewski's Problem on Randomly Signed sums, Revisited

Ravi B. Boppana, Harrie Hendriks, Martien C.A. van Zuijlen

P2.35
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Hidden Words Statistics for Large Patterns

Svante Janson, Wojciech Szpankowski

P2.36
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Note on Long Paths in Eulerian Digraphs

Charlotte Knierim, Maxime Larcher, Anders Martinsson

P2.37
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A Geometric and Combinatorial Exploration of Hochschild Lattices

Camille Combe

P2.38
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Elastic Elements in 3-Connected Matroids

George Drummond, Zach Gershkoff, Susan Jowett, Charles Semple, Jagdeep Singh

P2.39
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On the $e$-Positivity of $(claw, 2K_2)$-Free Graphs

Grace M. X. Li, Arthur L. B. Yang

P2.40
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A New Upper Bound on Extremal Number of Even Cycles

Zhiyang He

P2.41
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Large Monochromatic Components in Almost Complete Graphs and Bipartite Graphs

Zoltán Füredi, Ruth Luo

P2.42
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A Generalization of Stiebitz-Type Results on Graph Decomposition

Qinghou Zeng, Chunlei Zu

P2.43
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Circular Chromatic Number of Signed Graphs

Reza Naserasr, Zhouningxin Wang, Xuding Zhu

P2.44
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Lattice Polytopes from Schur and Symmetric Grothendieck Polynomials

Margaret Bayer, Bennet Goeckner, Su Ji Hong, Tyrrell McAllister, McCabe Olsen, Casey Pinckney, Julianne Vega, Martha Yip

P2.45
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On the Intersection Distribution of Degree Three Polynomials and Related Topics

Gohar Kyureghyan, Shuxing Li, Alexander Pott

P2.46
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Structure and Colour in Triangle-Free Graphs

N. R. Aravind, Stijn Cambie, Wouter Cames van Batenburg, Rémi de Joannis de Verclos, Ross J. Kang, Viresh Patel

P2.47
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The Normalized Matching Property in Random and Pseudorandom Bipartite Graphs

Niranjan Balachandran, Deepanshu Kush

P2.48
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Asymptotics of 3-Stack-Sortable Permutations

Colin Defant, Andrew Elvey Price, Anthony J. Guttmann

P2.49
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Hopf Algebra Structure of Generalized Quasi-Symmetric Functions in Partially Commutative Variables

Adam Doliwa

P2.50
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Channels, Billiards, and Perfect Matching 2-Divisibility

Grant T. Barkley, Ricky Ini Liu

P2.51
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