## Proceedings

The following papers have been accepted as talks, posters, and software demonstrations (presenters are underlined).

### Talks

Karim Adiprasito, __Gaku Liu__ and Michael Temkin: *Semistable reduction in characteristic 0*

Connor Ahlbach and __Joshua P. Swanson__: *Thrall's problem: cyclic sieving, necklaces, and branching rules*

__Emily Barnard__ and Thomas McConville: *Lattices from graph associahedra*

Nantel Bergeron, __Cesar Ceballos__ and Vincent Pilaud: *Hopf dreams*

__Dan Betea__, Jérémie Bouttier, Peter Nejjar and Mirjana Vuletić: *New edge asymptotics of skew Young diagrams via free boundaries*

Mireille Bousquet-Mélou, __Andrew Elvey Price__ and Paul Zinn-Justin: *Eulerian orientations and the six-vertex model on planar maps*

Cesar Ceballos, __Wenjie Fang__ and Henri Mühle: *The steep-bounce zeta map in parabolic Cataland*

__Cesar Ceballos__ and Viviane Pons: *The s-weak order and s-permutahedra*

Sylvie Corteel, __Olya Mandelshtam__ and Lauren Williams: *From multiline queues to Macdonald polynomials via the exclusion process*

__Samantha Dahlberg__: *A new formula for Stanley's chromatic symmetric function for unit interval graphs and e-positivity for triangular ladder graphs*

__Jehanne Dousse__: *On partition identities of Capparelli and Primc*

__Theo Douvropoulos__: *On enumerating factorizations in reflection groups*

__Jan Draisma__ and Felipe Rincón: *Tropical ideals do not realise all Bergman fans*

__Christopher Eur__: *Divisors on matroids and their volumes*

Christian Gaetz and __Yibo Gao__: *The weak Bruhat order on the symmetric group is Sperner*

__Alexander Garver__, Rebecca Patrias and Hugh Thomas: *Minuscule reverse plane partitions via quiver representations*

__Emily Gunawan__ and Ralf Schiffler: *Unitary friezes and frieze vectors*

__Iva Halacheva__, Allen Knutson and Paul Zinn-Justin: *Restricting Schubert classes to symplectic Grassmannians using self-dual puzzles*

__Tom Halverson__: *Set-partition tableaux, symmetric group multiplicities, and partition algebra modules*

__Judith Jagenteufel__: *A Sundaram type bijection for SO(2k+1): vacillating tableaux and pairs consisting of a standard Young tableau and an orthogonal Littlewood-Richardson tableau*

__Nadia Lafrenière__: *Eigenvalues of the symmetrized shuffling operators*

Cédric Lecouvey and __Cristian Lenart__: *Combinatorics of generalized exponents*

__Cédric Lecouvey__ and Pierre Tarrago: *Alcove random walks and k-Schur functions*

__Joel Brewster Lewis__ and Alejandro H. Morales: *Factorization problems in complex reflection groups*

Sho Matsumoto and __Piotr Śniady__: *Stanley character formula for the spin characters of the symmetric groups*

__Brendan Pawlowski__ and Brendon Rhoades: *Spanning line configurations*

Khrystyna Serhiyenko, __Melissa Sherman-Bennett__ and Lauren Williams: *Combinatorics of cluster structures in Schubert varieties*

### Poster session 1 (Monday, July 1)

__Ron M. Adin__, Ira M. Gessel, Victor Reiner and Yuval Roichman: *Cyclic quasi-symmetric functions*

Anshul Adve, __Colleen Robichaux__ and Alexander Yong: *Computational complexity, Newton polytopes, and Schubert polynomials*

Per Alexandersson and __Robin Sulzgruber__: *P-partitions and p-positivity*

Dave Anderson, Takeshi Ikeda, __Minyoung Jeon__ and __Ryotaro Kawago__: *Multiplicities of Schubert varieties in the symplectic flag variety*

Federico Ardila, Anna Schindler and __Andrés R. Vindas Meléndez__: *The equivariant volumes of the permutahedron*

Sami Assaf and Stephanie van Willigenburg (presenter: __Dominic Searles__): *Skew key polynomials and the key poset*

Spencer Backman, Francisco Santos and __Chi Ho Yuen__: *Topological bijections for oriented matroids*

__Rachel Bailey__ and Emily Gunawan: *Cluster algebras and binary words*

__Nicholas R. Beaton__, Aleksander L. Owczarek and Ruijie Xu: *Quarter-plane lattice paths with interacting boundaries: Kreweras and friends*

__Manfred Buchacher__ and Manuel Kauers: *Inhomogeneous restricted lattice walks*

Federico Castillo and __José Alejandro Samper__: *Finiteness theorems for matroid complexes with prescribed topology*

__Sunita Chepuri__: *Plabic R-matrices*

Adam Clearwater and __Mark Skandera__: *Total nonnegativity and evaluations of Hecke algebra characters*

Michele D'Adderio, __Alessandro Iraci__ and Anna Vanden Wyngaerd: *Delta conjectures*

Satyan L. Devadoss, Cassandra Durell and Stefan Forcey (presenter: __Vincent Pilaud__): *Split network polytopes and network spaces*

Matthew Farmer and __Joshua Hallam__: *The noncrossing bond poset of a graph*

__Oleksandra Gasanova__: *Powers of monomial ideals and the Ratliff-Rush operation*

__Sam Hopkins__: *The CDE property for skew vexillary permutations*

Ezgi Kantarcı Oğuz (presenter: __Can Ozan Oğuz__): *Descent polynomials, peak polynomials and an involution on permutations*

__Gene B. Kim__ and Sangchul Lee: *A central limit theorem for descents and major indices in fixed conjugacy classes of S _{n}*

__Alexander Lazar__ and Michelle L. Wachs: *On the homogenized linial arrangement: intersection lattice and Genocchi numbers*

__Duncan Levear__: *A bijection for Shi arrangement faces*

__Baptiste Louf__: *Simple formulas for constellations and bipartite maps with prescribed degrees*

__Eric Marberg__ and Brendan Pawlowski: *Stanley symmetric functions for signed involutions*

__Alina R. Mayorova__ and Ekaterina A. Vassilieva: *A q-deformed type B Cauchy identity and Chow’s quasisymmetric functions*

Stephen Melczer, __Greta Panova__ and Robin Pemantle: *Counting partitions inside a rectangle*

Cara Monical, __Oliver Pechenik__ and Dominic Searles: *K-theoretic polynomials*

__Henri Mühle__: *Ballot-noncrossing partitions*

Hiroshi Naruse and __Soichi Okada__: *Skew hook formula for d-complete posets via equivariant K-theory*

__Vincent Pilaud__: *Polytopal realizations and Hopf algebra structures for lattice quotients of the weak order*

__Ben Salisbury__ and Travis Scrimshaw: *Candidate for the crystal B(-∞) for the queer Lie superalgebra*

__Mario Sanchez__: *Möbius inversion as duality for Hopf monoids*

__Eric Stucky__: *Cyclic sieving, necklaces, and bracelets*

__Mariel Supina__: *The Hopf monoid of orbit polytopes*

__Nancy Wallace__: *Explicit combinatorial formulas for some irreducible characters of the GL _{k} × S_{n}-module of multivariate diagonal harmonics*

__Alexander Wang__ and Hailun Zheng: *Triangulations of the product of spheres with few vertices*

### Poster session 2 (Tuesday, July 2)

Marcelo Aguiar, __José Bastidas__ and Swapneel Mahajan: *Characteristic elements for real hyperplane arrangements*

Farid Aliniaeifard and __Nathaniel Thiem__: *Pattern groups and a poset based Hopf monoid*

Federico Ardila, __Federico Castillo__, Christopher Eur and Alexander Postnikov: *Deformations of Coxeter permutahedra and Coxeter submodular functions*

Sami Assaf and __Dominic Searles__: *Skew polynomials and extended Schur functions*

Jean-Christophe Aval, __Théo Karaboghossian__ and Adrian Tanasa: *Polynomial invariants and reciprocity theorems for the Hopf monoid of hypergraphs and its sub-monoids*

__Eli Bagno__, Riccardo Biagioli and David Garber: *Some identities involving second kind Stirling numbers of types B and D*

__Esther Banaian__ and __Elizabeth Kelley__: *Snake graphs and frieze patterns from orbifolds*

__Jérémie Bettinelli__: *Slit-slide-sew bijections for bipartite and quasibipartite plane maps*

__Henri Derycke__ and Yvan Le Borgne: *Restricted Tutte polynomials for some periodic oriented forests on infinite square lattice*

__Chris Bowman__, Maud De Visscher and John Enyang: *The lattice permutation condition for Kronecker tableaux*

__Sarah Brauner__, Forrest Glebe and David Perkinson: *Enumerating linear systems on graphs*

Michael Chmutov, __Gabriel Frieden__, Dongkwan Kim, Joel Brewster Lewis and Elena Yudovina: *An affine generalization of evacuation*

Hyunsoo Cho, __JiSun Huh__ and Jaebum Sohn: *A bijection between ordinary partitions and self-conjugate partitions with same disparity*

__Camille Combe__: *Cubic realizations of Tamari interval lattices*

__Joseph Doolittle__ and Bennet Goeckner: *Resolving Stanley's conjecture on k-fold acyclic complexes*

__Mark Dukes__ and Peter McNamara: *Refining the bijections among ascent sequences, (2+2)-free posets, integer matrices and pattern-avoiding permutations*

Richard Ehrenborg, __Gábor Hetyei__ and Margaret Readdy: *Refined face count in uniform triangulations of the Legendre polytope*

Sen-Peng Eu, __Tung-Shan Fu__, Hsiang-Chun Hsu, Hsin-Chieh Liao and Wei-Liang Sun: *Signed Mahonian identities on permutations with subsequence restrictions*

Ira M. Gessel and __Yan Zhuang__: *Homomorphisms on noncommutative symmetric functions and permutation enumeration*

__Rebecca Goldin__ and Allen Knutson: *Schubert structure operators*

__Darij Grinberg__: *A quotient of the ring of symmetric functions generalizing quantum cohomology*

__Zachary Hamaker__, Eric Marberg and Brendan Pawlowski: *Involution pipe dreams*

Rahul Ilango, Oliver Pechenik and __Michael Zlatin__: *Unique rectification in d-complete posets*

__Il-Seung Jang__ and Jae-Hoon Kwon: *Quantum nilpotent subalgebras of classical quantum groups and affine crystals*

__Michael Joseph__ and Tom Roby: *Birational antichain toggling and rowmotion*

__Donghyun Kim__: *A combinatorial formula for the Ehrhart h*-vector of the hypersimplex*

__Cédric Lecouvey__ and __Cristian Lenart__: *Atomic decomposition of characters and crystals*

Svante Linusson, __Samu Potka__ and Robin Sulzgruber: *On random shifted standard Young tableaux and 132-avoiding sorting networks*

Eric Marberg and __Yifeng Zhang__: *Affine transitions for involution Stanley symmetric functions*

Robert McAlmon, __Suho Oh__ and David Xiang: *Flats of a positroid from its decorated permutation*

__Kyle P. Meyer__: *Descent representations of generalized coinvariant algebras*

Cara Monical, Oliver Pechenik and __Travis Scrimshaw__: *Crystal structures for symmetric Grothendieck polynomials*

__Yann Palu__, Vincent Pilaud and Pierre-Guy Plamondon: *Non-kissing versus non-crossing*

__David Harry Richman__: *Equidistribution of Weierstrass points on a tropical curve*

__Sheila Sundaram__: *On the Schur positivity of sums of power sums*

### Software demonstrations

__Katja Berčič__: *Supporting data-driven mathematics: database and interface generation*

__Antonio Jiménez-Pastor__: *DD-finite functions in Sage*

__Wencin Poh__ and Anne Schilling: *Queer supercrystals in SageMath*

__Martin Rubey__ and Christian Stump: *FindStat – a database and search engine for combinatorial statistics and maps*

Lorenzo Venturello (presenter: __Alexander Wang__): *Balanced triangulations on few vertices and an implementation of cross-flips*

__Janoš Vidali__: *Computing distance-regular graph and association scheme parameters with sage-drg*