Proceedings

Proceedings

The full proceedings can be found in Sém. Lothar. Combin. issue 93B.

The following extended abstracts have been accepted as talks and posters (presenters are emphasized).

Best Student Submission Award

This year’s best student submission award goes to Grant Barkley for the submission Extended weak order for $\widetilde{S}_n$ and the lattice of torsion classes.

Talks

• Colleen Robichaux and Igor Pak: Signed combinatorial interpretations in algebraic combinatorics. (Extended abstract) (Slides)
• Per Alexandersson and Aryaman Jal: Rook matroids and log-concavity of P-Eulerian polynomials. (Extended abstract) (Slides)
• Yongle Luo and Baptiste Rognerud: Lattice of transfer systems. (Extended abstract) (Slides)
• Luis Ferroni, Jacob P. Matherne and Lorenzo Vecchi: Chow polynomials of posets. (Extended abstract) (Slides)
• Jasper M. Liu, Brendon Rhoades, Yichen Ma and Hai Zhu: Matrix loci, orbit harmonics, and shadow play. (Extended abstract) (Slides)
• Emma Yu Jin and Xiaowei Lin: Modified Macdonald polynomials and Mahonian statistics. (Extended abstract) (Slides)
• Eugene Gorsky, Soyeon Kim, Tonie Scroggin and José Simental: Splicing skew shaped Positroid varieties. (Extended abstract) (Slides)
• Jimmy He and Michael Wheeler: Symmetries of periodic and free boundary \(q\)-Whittaker measures. (Extended abstract) (Slides)
• Ilani Axelrod-Freed, Sarah Brauner, Patricia Grace Commins, Judy Hsin-Hui Chiang and Veronica Lang: Spectrum of random-to-random shuffling in the Hecke algebra. (Extended abstract) (Slides)
• Andrew Elvey Price, Wenjie Fang, Baptiste Louf and Michael Wallner: Bivariate asymptotics via random walks: application to large genus maps. (Extended abstract) (Slides)
• Álvaro Gutiérrez: Towards plethystic sl(2) crystals. (Extended abstract) (Slides)
• Raman Sanyal, Alexander E. Black and Niklas Lütjeharms: From linear programming to colliding particles. (Extended abstract)
• Elena S. Hafner, Karola Meszaros and Alexander C. Vidinas: Polytopal perspectives on the Alexander polynomial of special alternating links. (Extended abstract) (Slides)
• Edward Allen, Kyle Celano and Sarah Mason: A new proof of an inverse Kostka matrix problem posed by Egecioglu and Remmel and related identities in Sym and NSym. (Extended abstract) (Slides)
• Tatsuyuki Hikita: On the Stanley–Stembridge conjecture. (Extended abstract) (Slides)
• Amanda Burcroff, Kyungyong Lee and Lang Mou: A combinatorial formula for rank 2 scattering diagrams. (Extended abstract) (Slides)
• Hyeonjae Choi, Donghyun Kim and Seung Jin Lee: Lusztig \(q\)-weight multiplicities and KR crystals. (Extended abstract) (Slides)
• Juliette Schabanel: 3D permutations and triangle solitaire. (Extended abstract) (Slides)
• Enrica Duchi and Gilles Schaeffer: From order one catalytic decompositions to context-free specifications, bijectively. (Extended abstract) (Slides)
• Ryoshun Oba: Multigraded strong Lefschetz property for balanced simplicial complexes. (Extended abstract) (Slides)
• Adrien Segovia: \((P,\phi)\)-Tamari lattices. (Extended abstract) (Slides)
• Yassine El Maazouz and Yelena Mandelshtam: The positive orthogonal Grassmannian. (Extended abstract) (Slides)
• Philippe Nadeau, Hunter Spink and Vasu Tewari: Quasisymmetric Divided Differences. (Extended abstract) (Slides)
• Minh-Tâm Quang Trinh and Nathan Williams: Cell Decompositions of Hecke Traces and Link Polynomials. (Extended abstract) (Slides)
• Tracy Chin: Real Stability and Log Concavity are coNP-Hard. (Extended abstract) (Slides)
• Theo Douvropoulos and Olivier Bernardi: Deformations of restricted reflection arrangements. (Extended abstract)
• Grant Barkley: Extended weak order for \(\widetilde{S}_n\) and the lattice of torsion classes. (Extended abstract) (Slides)

Poster session I

• Tao Gui: Conjectures on the Reduced Kronecker Coefficients. (Extended abstract) (Poster)
• Colin Defant: Random Combinatorial Billiards and Stoned Exclusion Processes. (Extended abstract) (Poster)
• Stefan Mitrović: The Rédei–Bergé function in noncommuting variables. (Extended abstract) (Poster)
• Bruce Sagan and Alexander N. Wilson: Centralizers in the plactic monoid. (Extended abstract) (Poster)
• Jaeseong Oh and Donghyun Kim: Extending the Science Fiction and the Loehr–Warrington formula. (Extended abstract) (Poster)
• Kyla Pohl and Benjamin Young: Jack Combinatorics of the Equivariant Edge Measure. (Extended abstract) (Poster)
• Christian Gaetz and Yibo Gao: Bijections between interlacing triangles, Schubert puzzles, and graph colorings. (Extended abstract) (Poster)
• Chao Xu and Jiang Zeng: Variations of the $(\alpha,t)$-Eulerian polynomials and gamma positivity. (Extended abstract) (Poster)
• Kevin Liu and Mei Yin: Descents and flag major index on conjugacy classes of colored permutation groups without short cycles. (Extended abstract) (Poster)
• Ningxin Zhang: Characteristic Polynomials of Deformations of Coxeter Arrangements via Levels of Regions. (Extended abstract) (Poster)
• Yibo Gao and Hai Zhu: Boolean structure constants. (Extended abstract) (Poster)
• Hsin-Chieh Liao: Equivariant $\gamma$-positivity of Chow rings and augmented Chow rings of matroids. (Extended abstract) (Poster)
• Jeronimo Valencia-Porras: A combinatorial proof of an identity involving Eulerian numbers. (Extended abstract) (Poster)
• Reuven Hodges and Yibo Gao: Orbit structures and complexity in Schubert and Richardson Varieties. (Extended abstract) (Poster)
• Zach Benton, Jane Kwak, Suho Oh, Mateo Torres and Mckinley Xie: On z-superstable and critical configurations of chip-firing pairs. (Extended abstract) (Poster)
• Samrith Ram: Subspace profiles, $q$-Whittaker functions and Krylov methods. (Extended abstract) (Poster)
• Michael Borinsky, Chiara Meroni and Maximilian Wiesmann: Asymptotic count of edge-bicolored graphs. (Extended abstract) (Poster)
• Sathish Kumar V and Jacinta Torres: The branching models of Kwon and Sundaram via flagged hives. (Extended abstract) (Poster)
• Maria Gillespie, Joseph Pappe and Kyle Salois: When is the chromatic quasisymmetric function symmetric?. (Extended abstract) (Poster)
• Ryo Takahashi: Failure of the Lefschetz property for the Graphic Matroid. (Extended abstract) (Poster)
• Richard M. Green and Tianyuan Xu: Orthogonal roots, Macdonald representations, and quasiparabolic W-sets. (Extended abstract) (Poster)
• Mark Skandera and Daniel Soskin: Multiplicative permanental inequalities for totally positive matrices. (Extended abstract)
• Milo James Bechtloff Weising: Higher Rank Macdonald Polynomials. (Extended abstract) (Poster)
• John Lentfer: A conjectural basis for the (1, 2)-bosonic-fermionic coinvariant ring. (Extended abstract) (Poster)
• Yifeng Zhang: Molecules of affine fixed-point-free W-graphs. (Extended abstract) (Poster)
• Elena Hoster: The Chow and augmented Chow polynomials of Uniform Matroids. (Extended abstract) (Poster)
• Emil Verkama and Svante Linusson: Enumerating 1324-avoiders with few inversions. (Extended abstract) (Poster)
• Sebastian Degen and Lukas Kühne: Most q-matroids are not representable. (Extended abstract) (Poster)
• Sarah Brauner, Sylvie Corteel, Zajj Daugherty and Anne Schilling: Crystal skeletons and their axioms. (Extended abstract) (Poster)
• Hong Chen and Siddhartha Sahi: Schur positivity and Jack positivity. (Extended abstract) (Poster)
• Maria Gillespie, Eugene Gorsky and Sean Griffin: A geometric interpretation and skewing formula for the Delta Theorem. (Extended abstract) (Poster)
• Jake Levinson and Haggai Liu: Fundamental groups of moduli spaces of real weighted stable curves. (Extended abstract) (Poster)
• Farid Aliniaeifard and Shu Xiao Li: Peak algebra in noncommuting variables. (Extended abstract) (Poster)
• Kyle Celano, Jennifer Elder, Kimberly P. Hadaway, Pamela E. Harris, Amanda Priestley and Gabe Roland Udell: Inversions in Parking Functions. (Extended abstract) (Poster)
• Amanda Schwartz: The HOMFLY Polynomial of a Forest Quiver. (Extended abstract) (Poster)
• Yanjun Chen: On the Classification of Schubert Varieties in Partial Flag Varieties. (Extended abstract) (Poster)
• Masato Konoike: A new class of magic positive Ehrhart polynomials of reflexive polytopes. (Extended abstract) (Poster)
• Yifei Li and Sheila Sundaram: Rank-selected Segre powers of the Boolean lattice. (Extended abstract) (Poster)
• Zhehan Xu, Linji Chen and Lai Yunhao: The Isomorphism Problem for (Co)adjoint Schubert Varieties. (Extended abstract) (Poster)
• Jim Haglund, Jaeseong Oh and Meesue Yoo: $\alpha$-chromatic symmetric functions. (Extended abstract) (Poster)
• Ethan Y. H. Li, Grace. M. X. Li, Arthur L. B. Yang and Zhong-Xue Zhang: Strongly nice property and Schur positivity of graphs. (Extended abstract) (Poster)
• Arnau Padrol and Germain Poullot: New criteria for polytope indecomposability and new rays of the submodular cone. (Extended abstract) (Poster)
• Ryo Uchiumi: Permutation representation of classical Weyl groups on mod q lattices. (Extended abstract) (Poster)
• Kento Nakada, Takeshi Suzuki and Yoshitaka Toyosawai: Colored hooks and poset structure of cylindric diagrams. (Extended abstract) (Poster)
• Evita Nestoridi and Alan Yan: Cutoff for the Biased Random Transposition Shuffle. (Extended abstract) (Poster)
• Allen Knutson, Mario Sanchez and Melissa Sherman-Bennett: Permutahedral subdivisions and class formulas from Coxeter elements. (Extended abstract) (Poster)
• Brendon Rhoades, Vasu Tewari and Andy Wilson: Tutte polynomials in superspace. (Extended abstract) (Poster)
• Fu Liu and Warut Thawinrak: Faces of Parking Function Polytopes. (Extended abstract) (Poster)
• Raj Gandhi: Deforming the motivic Segre classes of Schubert cells in the Grassmannian. (Extended abstract) (Poster)
• Joonkyung Lee, Jaeseong Oh and Jaehyeon Seo: Counting homomorphisms in antiferromagnetic graphs via Lorentzian polynomials. (Extended abstract) (Poster)
• Abigail R. Price, Ada Mead Stelzer and Alexander Yong: Filtered RSK and matrix Schubert varieties. (Extended abstract) (Poster)
• Mitsuki Hanada: A charge monomial basis of the Garsia–Procesi ring. (Extended abstract) (Poster)
• Jihyeug Jang, Jang Soo Kim, Jianping Pan, Joseph Pappe and Anne Schilling: A hidden symmetry of refined canonical stable Grothendieck polynomials. (Extended abstract) (Poster)
• Andrew Reimer-Berg: Insertion algorithms and pattern avoidance on trees arising in the Kapranov embedding of M-bar_{0,n}. (Extended abstract) (Poster)
• Sam Spellman and Cristian Lenart: A Combinatorial Model for Affine Demazure Crystals of Levels Zero and One. (Extended abstract) (Poster)
• Alejandro Morales, Greta Panova, Leonid Petrov and Damir Yeliussizov: Grothendieck Shenanigans: Permutons from pipe dreams via integrable probability. (Extended abstract) (Poster)
• Evgeny Smirnov: Partial order on involutive permutations and B-orbit closures in double Grassmannians. (Extended abstract)
• Neha Shailesh Goregaokar: Interpreting the chromatic polynomial coefficients via hyperplane arrangements. (Extended abstract) (Poster)
• Sergi Elizalde: A generalized Lalanne–Kreweras involution for rectangular tableaux. (Extended abstract) (Poster)
• Robert Muth, Thomas Nicewicz, Liron Speyer and Louise Sutton: Simple modules for affine type A KLR algebras via skew Specht modules. (Extended abstract) (Poster)

Poster session II

• Joshua Maglione and Christopher Voll: Hall-Littlewood polynomials, affine Schubert series, and lattice enumeration. (Extended abstract) (Poster)
• Ming Yean Lim: The number of irreducibles in the plethysm $s_\lambda[s_m]$. (Extended abstract) (Poster)
• Ali Haidar and Oded Yacobi: Relations between generalised Gelfand-Tsetlin and Kazhdan-Lusztig bases of S_n. (Extended abstract) (Poster)
• Tongyu Nian, Shuhei Tsujie, Ryo Uchiumi and Masahiko Yoshinaga: q-deformation of graphic arrangements. (Extended abstract) (Poster)
• Emanuele Delucchi, Lukas Kühne and Leonie Mühlherr: Combinatorial invariants of finite metric spaces and the Wasserstein arrangement. (Extended abstract) (Poster)
• Riccardo Biagioli and Lorenzo Perrone: On a conjecture of Dyer on the join in the weak order of a Coxeter group. (Extended abstract) (Poster)
• Gavin Hobbs, Tommy Parisi, Mark Skandera and Jiayuan Wang: A generalization of Deodhar's defect statistic for Iwahori–Hecke algebras of type BC. (Extended abstract) (Poster)
• Ada Mead Stelzer and Alexander Yong: RSK as a linear operator. (Extended abstract) (Poster)
• Allen Knutson and Paul Zinn-Justin: Generic pipe dreams, lower-upper varieties, and Schwartz–MacPherson classes. (Extended abstract) (Poster)
• Hyunsoo Cho, Eunmi Kim, Ho-Hyeong Lee, Kyeongjun Lee, Ae Ja Yee and Jaeyeong Yoo: GBG-rank generating functions for ordinary, self-conjugate, and doubled distinct partitions. (Extended abstract) (Poster)
• Jiyang Gao, Shiliang Gao and Yibo Gao: Quantum Bruhat Graphs and Tilted Richardson Varieties. (Extended abstract) (Poster)
• Kam Hung Tong: Orbits in the affine flag variety of type A. (Extended abstract) (Poster)
• Sam Armon and Joshua P. Swanson: On a super version of Thrall's problem. (Extended abstract) (Poster)
• Tatyana Benko and Benjamin Young: Double boxes and double dimers. (Extended abstract) (Poster)
• Alexander E. Black, Sophie Rehberg and Raman Sanyal: Poset Permutahedra. (Extended abstract) (Poster)
• Raymond Oliver Chou, Brendon Rhoades and Tomoo Matsumura: Equivariant Cohomology of Grassmannian Spanning Lines. (Extended abstract)
• Jaewon Min: Proof of the Newell–Littlewood saturation conjecture. (Extended abstract) (Poster)
• Muchen Ju, Junjie Ni, Yihan Xiao and Kaixin Wang: Arborescences of Random Covering Graphs. (Extended abstract) (Poster)
• Eric Marberg and Jiayi Wen: On some Grothendieck expansions. (Extended abstract) (Poster)
• Akihiro Higashitani: Equivariant $\gamma$-nonnegativity of order polytopes of graded posets. (Extended abstract) (Poster)
• Harry Richman, Farbod Shokrieh and Chenxi Wu: Principal minors of tree distance matrices. (Extended abstract) (Poster)
• Filip Jonsson Kling, Samuel Lundqvist, Fatemeh Mohammadi, Matthias Orth and Eduardo Saenz-de-Cabezon: Gröbner bases and the Lefschetz properties for powers of a general linear form in the squarefree algebra. (Extended abstract) (Poster)
• Elise Catania: A Toric Analogue for Greene's Rational Function. (Extended abstract) (Poster)
• Jonah Berggren: Turbulence Polyhedra. (Extended abstract) (Poster)
• Ziyao Fu, Ni Tang, Sylvester W. Zhang and Yunchi Zheng: Expansion Formulae for $SL_3$ Fock-Goncharov Cluster Algebras. (Extended abstract) (Poster)
• Sylvie Corteel, Alexander Lazar and Anna Vanden Wyngaerd: Positivity Phenomena for Lattice Paths at q = -1. (Extended abstract) (Poster)
• Anita Arora: The monopole-dimer model on high-dimensional cylindrical, toroidal, Möbius and Klein grids. (Extended abstract) (Poster)
• Matthias Beck and Danai Deligeorgaki: Canon Permutation Posets. (Extended abstract)
• Ekaterina Vassilieva and Darij Grinberg: A permutation based approach to the q-deformation of the Dynkin Operator. (Extended abstract) (Poster)
• Grant Barkley, Jonathan Boretsky, Christopher Eur and Jiyang Gao: On Two Notions of Total Positivity for Generalized Partial Flag Varieties of Classical Lie Types. (Extended abstract) (Poster)
• Yakob Kahane and Marni Mishna: Differential transcendence and walks on self-similar graphs. (Extended abstract) (Poster)
• Cesar Ceballos and Matthias Mueller: Geometric Realizations of $\nu$-Associahedra via Brick Polyhedra (Extended Abstract). (Extended abstract) (Poster)
• Houcine Ben Dali, Valentin Bonzom and Maciej Dołęga: (q,t)-tau functions and path operators. (Extended abstract) (Poster)
• Yairon Cid-Ruiz, Yupeng Li and Jacob P. Matherne: Logarithmic concavity of polynomials arising from equivariant cohomology. (Extended abstract)
• Dominique Guillot, Himanshu Gupta, Prateek Kumar Vishwakarma and Chi Hoi Yip: Entrywise transforms and positive definite matrices over finite fields. (Extended abstract) (Poster)
• Esther Banaian, Elise Catania, Christian Gaetz, Miranda Moore, Gregg Musiker and Kayla Wright: Twists, r-dimer covers, and web duality. (Extended abstract)
• Clément Chenevière, Wenjie Fang and Corentin Henriet: A new definition for $m$-Cambrian lattices. (Extended abstract) (Poster)
• Ayah K. Almousa, Shiliang Gao and Daoji Huang: Standard Monomials for Positroid Varieties. (Extended abstract) (Poster)
• Sara Billey and Matjaž Konvalinka: Quilts of Alternating Sign Matrices. (Extended abstract) (Poster)
• Antoine Abram and Jose Bastidas: The $h^∗$-polynomials of type C hypersimplices. (Extended abstract) (Poster)
• Michael Gonzalez, Rosa Orellana and Mario Tomba: On the reconstruction of trees from their chromatic symmetric functions. (Extended abstract) (Poster)
• Ian Cavey and Yi-Lin Lee: Domino Tilings and Macdonald Polynomials. (Extended abstract) (Poster)
• Christian Gaetz, Oliver Pechenik, Stephan Pfannerer, Jessica Striker and Joshua P. Swanson: Web bases for two-column tableaux from hourglass plabic graphs. (Extended abstract) (Poster)
• Jack Kendrick, Elise Catania, Heather M. Russell and Julianna S. Tymoczko: Identifying Orbit Lengths for Promotion. (Extended abstract) (Poster)
• Santiago Estupinan and Oliver Pechenik: A new shifted Littlewood–Richardson rule and related developments. (Extended abstract) (Poster)
• Mitchell Lee: The restriction problem and the Frobenius transform. (Extended abstract) (Poster)
• Daniel Soskin and Prateek Kumar Vishwakarma: Plücker inequalities for weakly separated coordinates in TNN Grassmannians. (Extended abstract) (Poster)
• Nick Early, Lukas Kühne and Leonid Monin: Minkowski Decompositions of Alcoved Polytopes. (Extended abstract) (Poster)
• Jinting Liang and Bruce E. Sagan: Log-concavity and log-convexity via distributive lattices. (Extended abstract) (Poster)
• Joshua Arroyo, Zachary Hamaker, Jianping Pan and Graham Hawkes: Type C K–Stanley symmetric functions and Kraskiewicz–Hecke insertion. (Extended abstract) (Poster)
• Gabe Roland Udell and Raj Gandhi: A degeneration of the brick variety and a mixed subdivision of the associahedron into cubes. (Extended abstract) (Poster)
• Daoji Huang, Mark Shimozono and Tianyi Yu: A Bijection Between Marked Bumpless Pipedreams and Compatible Pairs. (Extended abstract)
• William T. Dugan, Maura Hegarty, Alejandro H. Morales and Annie Raymond: Volume and Lattice Points of Generalized Pitman–Stanley Flow Polytopes. (Extended abstract)
• Yibo Gao, Thomas Lam and Lei Xue: Dual mixed volumes of polytopes. (Extended abstract)
• Tuong Le, Shuge Ouyang, Leo Tao, Joseph Restivo and Angelina Zhang: Quantum bumpless pipe dreams. (Extended abstract) (Poster)
• Juliana Curtis: The Integer Decomposition Property in Smooth Polytopes. (Extended abstract) (Poster)
• Danai Deligeorgaki, Bin Han and Liam Solus: Colored multiset Eulerian polynomials. (Extended abstract)
• Portia Anderson: Commutative Properties of Schubert Puzzles with Convex Polygonal Boundary Shapes. (Extended abstract) (Poster)
• Matteo Parisi, Melissa Sherman-Bennett, Ran Tessler and Lauren Williams: The Magic Number Conjecture for the m = 2 Amplituhedron and Parke-Taylor Polytopes. (Extended abstract)
• Alex McDonough and Theo Douvropoulos: Generalized Laplacian tilings and root zonotopes. (Extended abstract) (Poster)
• Ilani Axelrod-Freed, Jiyang Gao and Sylvester W. Zhang: Rhombic Tableaux for Partial Flag Varieties. (Extended abstract) (Poster)
• Zhixing Chen, Yumou Fei, Jiyang Gao, Yuxuan Sun and Yuchong Zhang: Partial flag positroids. (Extended abstract)

Software demonstrations

• Benjamin Hackl, Andrew Luo, Steve Melczer and Éric Schost: A SageMath Package for Analytic Combinatorics in Several Variables: Beyond the Smooth Case. (Extended abstract)
• Oliver Clarke and Alexander Milner: Computing all Markov Bases. (Extended abstract)

Misc

• Thomas Aird and Duarte Chambel Ribeiro: Plactic-like monoids arising from meets and joins of taiga congruences. (Extended abstract)
• Serena An, Katherine Tung and Yuchong Zhang: Newton polytopes of dual Schubert polynomials. (Extended abstract) (Poster)
• Olivier Bernardi: Bijections for faces of braid-type arrangements. (Extended abstract)
• Alin Bostan, Frédéric Chyzak, Bérénice Delcroix-Oger, Guillaume Laplante-Anfossi, Vincent Pilaud and Kurt Stoeckl: Diagonals of permutahedra and associahedra. (Extended abstract)
• Maria Gillespie: Higher Specht polynomials for the diagonal action. (Extended abstract)
• Samuele Giraudo and Yannic Vargas: Operads of packed words, quotients, and monomial bases. (Extended abstract)
• Yuhan Jiang: The Ehrhart $h^*$-polynomials of positroid polytopes. (Extended abstract)
• Eva Philippe and Vincent Pilaud: The s-permutahedron and its lattice quotients. (Extended abstract)
• Foster Tom: On $e$-positivity of trees and connected partitions. (Extended abstract)