Issue 95B

Proceedings of the 38th International Conference on "Formal Power Series and Algebraic Combinatorics", July 13 - 17, 2026, University of Washington, Seattle, USA

Preface

Extended Abstracts of Talks and Posters

[95B.1] Alexander E. Black and Milo Bechtloff Weising

Saturation for Non-symmetric Macdonald Polynomials (12 pp.)

[95B.2] Sam Hopkins, Jesse Kim and Stephan Pfannerer

Cyclic Sieving for Staircase Plane Partitions via Crystals and Electrical Networks (12 pp.)

[95B.3] Ming Yean Lim

On Asymptotics of Unitriangular Groups (12 pp.)

[95B.4] Foster Tom and Aarush Vailaya

The Chromatic Symmetric Function of Graphs Glued at a Single Vertex (12 pp.)

[95B.5] Ron M. Adin, Sergi Elizalde, Pál Hegedüs, and Yuval Roichman

Descent Sets of Permutations with Only Even or Only Odd Cycle Lengths (12 pp.)

[95B.6] Matt Larson and Alan Stapledon

Complementary Vectors of Doubly Cohen-Macaulay Complexes (11 pp.)

[95B.7] Mohammad Bardestani, Keivan Mallahi-Karai, Samrith Ram and Hadi Salmasian

Point Counting on Intersections of Adjoint Orbits with Ad-Nilpotent Ideals over F_q (12 pp.)

[95B.8] Houcine Ben Dali and Lauren Kiyomi Williams

A Combinatorial Formula for Interpolation Macdonald Polynomials (12 pp.)

[95B.9] Jesú,s A. De Loera, Jillian Eddy, Sawyer Jack Robertson, and José A. Samper

Which Polytopes are Positively Curved? (11 pp.)

[95B.10] Lazar Guterman and Eran Nevo

Matroids Arising from Algebraic Shifting (12 pp.)

[95B.11] Seunghun Lee and Eran Nevo

On an Extension Problem on the Moment Curve (12 pp.)

[95B.12] Robert Angarone, Patricia Commins, Trevor Karn, Satoshi Murai, Brendon Rhoades, and Andy Wilson

The Superspace Coinvariant Ring (12 pp.)

[95B.13] Colin Defant, Melissa Sherman-Bennett, and Nathan Williams

Permutahedron Triangulations via Total Linear Stability and the Dual Braid Group (12 pp.)

[95B.14] Anna Weigandt

Changing Bases with Pipe Dream Combinatorics (12 pp.)

[95B.15] Sara Billey, Herman Chau, and Kevin Liu

Commutation Classes of Reduced Words and Higher Bruhat Orders for Affine Permutations (12 pp.)

[95B.16] Eric Marberg, Kam Hung Tong and Tianyi Yu

Grothendieck Positivity for Square Root Crystals (12 pp.)

[95B.17] Florent Hivert, Vincent Pilaud and Ludovic Schwob

Heaps of rhombic dodecahedra, catalan Congruences on Alternating Sign Matrices, and Bases of the Temperley-Lieb Algebra (12 pp.)

[95B.18] Andrew Elvey Price, Emmanuel Humbert and Kilian Raschel

On the Finiteness of the Group Associated with Weighted Walks in multidimensional Orthants (12 pp.)

[95B.19] Rosa Paten and Dora Woodruff

Key Positivity and Temperley-Lieb Immanants (12 pp.)

[95B.20] Petter Brändén and Lorenzo Vecchi

Chow Polynomials of Totally Nonnegative Matrices and Posets (12 pp.)

[95B.21] Chau Nguyen, Son Nguyen and Dora Woodruff

Shuffle Tableaux, Littlewood-Richardson Coefficients, and Schur Log-Concavity (12 pp.)

[95B.22] Jose Bastidas, Sarah Brauner, Mathieu Guay-Paquet, Alejandro H. Morales, GaYee Park and Franco Saliola

Factorizations for the Iwahori-Hecke Algebra (12 pp.)

[95B.23] Raj Gandhi and Ethan Partida

Algebraic Cobordism Rings of Wonderful Varieties and Matroids (12 pp.)

[95B.24] Luis Ferroni, Alejandro H. Morales and Greta Panova

Skew Shapes, Ehrhart Positivity and Beyond (12 pp.)

[95B.25] Patricia Commins and Benjamin Steinberg

Invariant Theory for Left Regular Bands (12 pp.)

[95B.26] Sergi Elizalde

Cylindric Growth Diagrams (12 pp.)

[95B.27] Ron M. Adin, Yuval Roichman and Natalia Tsilevich

Asymptotics of Higher Lie Characters (Extended Abstract) (12 pp.)

[95B.28] Nicolas Avila, Luis Ferroni and Alejandro H. Morales

Luck aand Magic for Pitman-Stanley Polytopes aand Parking Functions (12 pp.)

[95B.29] Sarah Brauner, Patricia Commins, Darij Grinberg and Franco Saliola

The q-Deformed Random-to-Random Family in the Hecke Algebra (12 pp.)

[95B.30] Christopher Eur, Alex Fink and Matt Larson

h^*-Vectors for Matroids (12 pp.)

[95B.31] Zawad Chowdhury, Stefan Steinerberger and Rekha Thomas

Graphical Designs find Combinatorial Structures (Extended Abstract) (12 pp.)

[95B.32] Michele D'Adderio and Alessio Sgubin

A Loehr-Remmel Bijection in the n × kn grid (12 pp.)

[95B.33] Siddarth Kannan and Terry Dekun Song

Pólya Enumeration, Wreath Product Symmetric Functions, and Moduli Spaces of Curves (12 pp.)

[95B.34] Jon Pål Hamre, Benjamin Schröter, Lorenzo Vecchi and Emil Verkama

Chow Classes of Matroids and Standard Young Tableaux (12 pp.)

[95B.35] Colin Defant, Yuhan Jiang, Rene Marczinzik, Adrien Segovia, David E Speyer, Hugh Thomas and Nathan Williams*

Rowmotion and Echelonmotion (12 pp.)

[95B.36] Nathan Reading and Tanvi Thummar

m is for meet-congruence (12 pp.)

[95B.37] Yibo Gao and Rui Xiong

Positivity in Triple Schubert Calculus (11 pp.)

[95B.38] Ivan Balashov, Constantine Bulavenko and Yaroslav Molybog

Asymptotics of Generalized Tesler Matrices (12 pp.)

[95B.39] Beth Anne Castellano, Rosa Orellana and Mike Zabrocki

Transition Matrices for cCharacter Bases of the Symmetric Group (12 pp.)

[95B.40] Ruizhen Liu

Deligne-Lusztig Varieties, Toric Orbifolds, and the q-Klyachko Algebra (12 pp.)

[95B.41] Colin Crowley and Ethan Partida

Graded Ehrhart Theory of Unimodular Zonotopes (12 pp.)

[95B.42] Tao Gui, Yuqi Jia, Xinkai Yu, Zhexi Zhang and Yuchen Zhu

Structure Constants of Peterson Schubert Calculus (12 pp.)

[95B.43] Oliver Clarke, Akihiro Higashitani and Francesca Zaffalon

Combinatorial Mutation Equivalence of Restricted Chain-Order Polytopes (12 pp.)

[95B.44] Cristian Lenart, Rui Xiong and Changlong Zhong

On the Combinatorics of Schubert Calculus in Elliptic Cohomology (12 pp.)

[95B.45] Marie Albenque and Laurent Ménard and Nicolas Tokka

Blossoming Bijection for Bipartite Maps: a new Approach via orientations and Applications to the Ising Model (12 pp.)

[95B.46] Daniel Hwang, Juliet Whidden and Josephine Yu

Computing Parametric Weighted Ehrhart Polynomials of Smooth Polytopes (12 pp.)

[95B.47] Zachary Hamaker and Jesse Kim

Odd Shifted Parking Functions (12 pp.)

[95B.48] Christin Bibby and Peter Ramsey

The Orlik-Solomon Algebra of a Locally Geometric Poset (12 pp.)

[95B.49] Elisabeth Bullock and Yuhan Jiang

The Ehrhart Series of Alcoved Polytopes (12 pp.)

[95B.50] Marcus Schönfelder

The 1/4-Phenomenon of Placement Probabilities in the Aztec Diamond (12 pp.)

[95B.51] Joseph McDonough, Pavlo Pylyavskyy, and Shiyun Wang

Kirillov-Reshetikhin dual Equivalence Graphs (12 pp.)

[95B.52] Igor Pak and Colleen Robichaux

Vanishing of Schubert Coefficients in Probabilistic Polynomial Time (12 pp.)

[95B.53] Federico Ardila-Mantilla, Sergio Cristancho, Graham Denham, Christopher Eur, June Huh and Botong Wang

Tree Metrics and Log-Concavity for Matroids (12 pp.)

[95B.54] Kyle Huang, Robert Lauff and Charles Zhang (Software Presentation)

UniTriSat: Unimodular Triangulations via SATISFIABILITY (12 pp.)

[95B.55] Yakob Kahane

On Two Open Problems on Ehrhart Polynomials of Fences (12 pp.)

[95B.56] Sota Asai, Osamu Iyama, Kaveh Mousavand and Charles Paquette

Left modular and Extremal Lattices Through Brick-Directed Algebras (12 pp.)

[95B.57] Theo Douvropoulos

Extended Cyclic Sieving Phenomena (12 pp.)

[95B.58] Kieran Calvert, Aram Dermenjian, Alex Fink and Ben Smith

Quadratic Exchange Equations for Coxeter Matroids (12 pp.)

[95B.59] Ada Stelzer

Surprise Polynomiality in Algebraic Combinatorics (12 pp.)

[95B.60] Jonathan Boretsky and Zach Walsh

Excluding a Line from Positroids (12 pp.)

[95B.61] Ilani Axelrod-Freed, Sara Billey, Colin Defant, Connor McCausland, Clare Minnerath, Hanna Mularczyk, Son Nguyen and Katherine Tung

Two Proofs of Rubey's Lattice Conjecture (12 pp.)

[95B.62] Chaim Even-Zohar, Matteo Parisi, Melissa Sherman-Bennett, Ran Tessler and Lauren Williams

Plabic Tangles and Cluster Promotion Maps (12 pp.)

[95B.63] Thomas McConville, James Propp and Bruce E. Sagan

Hyperbinary Partitions and q-Deformed Rationals (12 pp.)

[95B.64] Aaron Lauve and Anthony Lazzeroni

Interpolation in Species and a Lift of the Hopf Algebra of r-Quasisymmetric Functions (12 pp.)

[95B.65] Álvaro Gutiérrez, Álvaro L. Martínez, Michał Szwej and Mark Wildon

Plethystic Lifts of q-Binomial Identities (12 pp.)

[95B.66] Spencer Backman, Richard Danner, Hsin-Chieh Liao and Crow Stephenson

Combinatorics of Leray Models for Permutahedral Varieties and Beyond (12 pp.)

[95B.67] Jehanne Dousse, Jihyeug Jang and Frédéric Jouhet

Particle Motion Methods for Andrews-Gordon and Stanton Type Identities (12 pp.)

[95B.68] Alibek Adilzhan and Damir Yeliussizov

Flagged Hamel-Goulden Formulas (12 pp.)

[95B.69] Elena Hoster and Christian Stump

Chow Polynomials of Simplicial Posets with Positive h-Vector are Real-Rooted (12 pp.)

[95B.70] Arvind Ayyer and Naren Sundaravaradan

A Bijection on Balanced Words Reversing both des and maj (12 pp.)

[95B.71] Spencer Backman, Galen Dorpalen-Barry, Anastasia Nathanson, Ethan Partida and Noah Prime

Line Shellings of Bergman Fans (12 pp.)

[95B.72] Qi Fang, Shishuo Fu, Haijun Li and Quan Yuan

Parity Patterns Meet Genocchi Numbers: four Labelings and Three Bijections (12 pp.)

[95B.73] Eric Marberg

Classical Double Grothendieck Transitions (12 pp.)

[95B.74] Ben Adenbaum, Spencer Daugherty and Nicholas Mayers

Dimensions of Toggleability Spaces (12 pp.)

[95B.75] Darij Grinberg, Tom Roby, Stephan Wagner and Mei Yin

Downs and Ups in the Weyl Algebra (12 pp.)

[95B.76] Jason Stack

Parking Spaces for Complex Reflection Groups (12 pp.)

[95B.77] Jonathan Boretsky, Veronica Calvo Cortes and Yassine El Maazouz

Totally Positive Skew-Symmetric matrices (12 pp.)

[95B.78] Christian Gaetz and Yibo Gao

Billey-Postnikov Posets (12 pp.)

[95B.79] Sean T. Griffin, Anton Mellit, Marino Romero, Kevin Weigl and Joshua Jeishing Wen

A Macdonald Expansion of the q-Chromatic Symmetric Functions and the Stanley-Stembridge Conjecture (12 pp.)

[95B.80] Igor Makhlin

Tropical Cluster Varieties, Phylogenetic Trees, and Generalized Associahedra (11 pp.)

[95B.81] Christian Gaetz, Jessica Striker, Joshua P. Swanson and Haihan Wu

Web Bases, Pocket Complexes, and Affine Buildings (12 pp.)

[95B.82] Dawei Shen and Emanuele Ventura

The ABCT Variety is a Positive Geometry (12 pp.)

[95B.83] Avery St. Dizier, Linus Setiabrata and Tianyi Yu

Generalized Orthodontia, Punched Tableaux, and Lascoux Expansion of Sheared Characters (12 pp.)

[95B.84] Hans Höngesberg, Matjaž Konvalinka and Martin Rubey

Properties of the Quilt Lattice (12 pp.)

[95B.85] Seamus Albion Ferlinc and Joshua Jeishing Wen

A Modular (q,t)-Nekrasov-Okounkov Formula and Wreath Macdonald Polynomials (12 pp.)

[95B.86] Anastasia Nathanson

Multipermutohedral Chow Rings (12 pp.)

[95B.87] John Lentfer

Diagonal Supersymmetry for Coinvariant Rings (12 pp.)

[95B.88] Saskia Solotko, Katherine Tung, Mengyuan Yang and Yuchong Zhang

Multitriangulations on Ciliated Surfaces (12 pp.)

[95B.89] Jack Chen-An Chou, Linus Setiabrata and Tianyi Yu

Grothendieck Polynomials of Fireworks and Inverse Fireworks Permutations (12 pp.)

[95B.90] Andrew Sack

Lattices from Pointed Building Sets: Generalized Ornamentation Lattices (12 pp.)

[95B.91] Antoine Abram, Jose Bastidas, Benjamin Dequêne, Alejandro H. Morales, GaYee Park and Hugh Thomas

Flows on Cyclic Graphs, Complete Gentle Algebras, and the Mutoperhedron (12 pp.)

[95B.92] Aram Bingham, Lisa Johnston, Colin Lawson, Rosa Orellana, Jianping Pan and Chelsea Sato

The Chromatic Symmetric Function for Unicyclic Graphs (12 pp.)

[95B.93] Olivier Bernardi and Neha Goregaokar

Bijectivity of a Generalized Pak-Stanley Labeling (12 pp.)

[95B.94] Julia Bierent, David Jordan, Matthias Vancraeynest and Monica Vazirani

Dimension of the GL_N Skein Module of the Mapping Torus (12 pp.)

[95B.95] Xiaoyu Huang, Blake Jackson and Kyu-Hwan Lee

From Black Box to Bijection: Interpreting Machine Learning to Build a Zeta Map Algorithm (12 pp.)

[95B.96] Guilherme Zeus Dantas e Moura and Olya Mandelshtam

Shape Changing Identities for Permuted-Basement Nonsymmetric Macdonald Polynomials (12 pp.)

[95B.97] Raymond Chou and Mitsuki Hanada

A Descent Basis for the Δ-Springer Module (12 pp.)

[95B.98] Jaewon Min

When is a Schubert Variety Spherical? (12 pp.)

[95B.99] Dawei Shen, Mia Smith and David E. Speyer

Electroid Varieties and the Lagrangian Grassmannian (12 pp.)

[95B.100] Suchakree Chueluecha and Jennifer Morse

Skew-Linked Catalan Functions and Genocchi Numbers (12 pp.)

[95B.101] Olivier Bernardi and Jonathan J. Fang

Subgraphs Vs Orientations: Infinite Families of Equidistributions (12 pp.)

[95B.102] Nathan Lindzey

An Eventown Result for Permutations (12 pp.)

[95B.103] Timothy Blanton, Jesús A. De Loera and Melissa Sherman-Bennett

On Orbit Realizations of Coxeter Permutahedra (12 pp.)

[95B.104] Takashi Imamura, Matteo Mucciconi, Tomohiro Sasamoto and Travis Scrimshaw

The Periodic Multi-Layer Polynuclear Growth: Integrability and Applications (12 pp.)

[95B.105] Timothy Blanton, Anton Dochtermann, Isabelle Hong, Suho Oh and Zhan Zhan

Parking Functions and Chip-Firing on Hypergraphs (12 pp.)

[95B.106] Ariana Chin

Classification of Zamolodchikov Periodic Cluster Algebras (12 pp.)

[95B.107] Nantel Bergeron, Lucas Gagnon, Hunter Spink and Vasu Tewari

Introducing the Coxeter Flag Variety (12 pp.)

[95B.108] Leigh Foster (Software Presentation)

Tilepaint: Visualizations and Calculations in Tilings, Perfect Matchings, and n-mer Covers (6 pp.)

[95B.109] Laura Escobar, Patricia Klein and Anna Weigandt

Algebra and Geometry of ASM Weak Order (12 pp.)