Proceedings

SLC Proceedings

The proceedings of FPSAC 2026 have been posted in Issue 95B of the Séminaire Lotharingien de Combinatoire.

Talk Recordings

All available talk recordings can be found in this YouTube playlist.

Best Student Paper

The best student paper award goes to Ruizhen Liu for his submission Deligne–Lusztig varieties, toric orbifolds, and the $q$-Klyachko algebra.

Extended Abstracts

The following extended abstracts were accepted as talks, posters, and software demonstrations. Names of presenters are followed by asterisks (*).

Talks

• Ron Adin, Sergi Elizalde, Pál Hegedüs and Yuval Roichman*: Descent sets of permutations with only even or only odd cycle lengths (Abstract)
• Seamus Albion Ferlinc* and Joshua Jeishing Wen: A modular $(q,t)$-Nekrasov–Okounkov formula and wreath Macdonald polynomials (Abstract)
• Robert Angarone, Patricia Commins, Trevor Karn, Satoshi Murai, Brendon Rhoades* and Andy Wilson: The superspace coinvariant ring (Abstract)
• Federico Ardila-Mantilla, Sergio Cristancho*, Graham Denham, Christopher Eur, June Huh and Botong Wang: Tree metrics and log-concavity for matroids (Abstract)
• Arvind Ayyer and Naren Sundaravaradan*: A bijection on balanced words reversing both des and maj (Abstract)
• Houcine Ben Dali* and Lauren Kiyomi Williams: A combinatorial formula for Interpolation Macdonald polynomials (Abstract)
• Petter Brändén and Lorenzo Vecchi*: Chow polynomials of totally nonnegative matrices and posets (Abstract)
• Elisabeth Bullock* and Yuhan Jiang: The Ehrhart Series of Alcoved Polytopes (Abstract)
• Colin Defant*, Yuhan Jiang, Rene Marczinzik, Adrien Segovia, David E. Speyer, Hugh Thomas and Nathan Williams: Rowmotion and Echelonmotion (Abstract)
• Andrew Elvey Price*, Emmanuel Humbert and Kilian Raschel: On the finiteness of the group associated with weighted walks in multidimensional orthants (Abstract)
• Christopher Eur*, Alex Fink and Matthew Larson: $h^*$–vectors for matroids (Abstract)
• Chaim Even-Zohar, Matteo Parisi*, Melissa Sherman-Bennett, Ran Tessler and Lauren Williams: Plabic tangles and cluster promotion maps (Abstract)
• Sean 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 (Abstract)
• Tao Gui, Yuqi Jia, Xinkai Yu, Zhexi Zhang* and Yuchen Zhu: Structure constants of Peterson Schubert calculus (Abstract)
• Sam Hopkins, Jesse Kim and Stephan Pfannerer*: Cyclic sieving for staircase plane partitions via crystals and electrical networks (Abstract)
• Xiaoyu Huang, Blake Jackson* and Kyu-Hwan Lee: From Black Box to Bijection: Interpreting Machine Learning to Build a Zeta Map Algorithm (Abstract)
• Seunghun Lee* and Eran Nevo: On an extension problem on the moment curve (Abstract)
• Cristian Lenart*, Rui Xiong and Changlong Zhong: On the Combinatorics of Schubert Calculus in Elliptic Cohomology (Abstract)
• Nathan Lindzey*: An Eventown Result for Permutations (Abstract)
• Ruizhen Liu*: Deligne–Lusztig varieties, toric orbifolds, and the $q$-Klyachko algebra (Abstract)
• Eric Marberg, Kam Hung Tong and Tianyi Yu*: Grothendieck positivity for square root crystals (Abstract)
• Thomas McConville*, James Propp and Bruce Sagan: Hyperbinary partitions and $q$-deformed rationals (Abstract)
• Jaewon Min*: When is a Schubert variety spherical? (Abstract)
• Igor Pak and Colleen Robichaux*: Vanishing of Schubert coefficients in probabilistic polynomial time (Abstract)
• Dawei Shen, Mia Smith* and David E. Speyer: Electroid Varieties and the Lagrangian Grassmannian (Abstract)
• Saskia K. Solotko*, Katherine Tung, Mengyuan Yang and Yuchong Zhang: Multitriangulations on ciliated surfaces (Abstract)
• Anna Weigandt*: Changing Bases with Pipe Dream Combinatorics (Abstract)

Poster Session 1

• Ben Adenbaum*, Spencer Daugherty and Nicholas Mayers: Dimensions of toggleability spaces (Abstract)
• Ron M. Adin, Yuval Roichman and Natalia Tsilevich*: Asymptotics of higher Lie characters (Abstract)
• Marie Albenque, Laurent Ménard and Nicolas Tokka*: Blossoming bijection for bipartite maps: a new approach via orientations and applications to the Ising model (Abstract)
• Ilani Axelrod-Freed*, Colin Defant, Katherine Tung, Hanna Mularczyk, Sara Billey, Clare Minnerath, Connor T. McCausland* and Son Nguyen: Two Proofs of Rubey’s Lattice Conjecture (Abstract)
• Spencer Backman, Richard Danner, Hsin-Chieh Liao* and Crow Stephenson: Combinatorics of Leray models for permutahedral varieties and beyond (Abstract)
• Ivan Balashov, Constantine Bulavenko and Yaroslav Molybog*: Asymptotics of generalized Tesler matrices (Abstract)
• Julia Bierent, David Jordan, Matthias Vancraeynest and Monica Vazirani*: Dimension of the $GL_N$ skein module of the mapping torus (Abstract)
• Alexander E. Black and Milo James Bechtloff Weising*: Saturation for Non-symmetric Macdonald Polynomials (Abstract)
• Timothy Russell Blanton, Anton Dochtermann, Isabelle Hong, Suho Oh and Zhan Zhan*: Parking functions and chip-firing on hypergraphs (Abstract)
• Jonathan Boretsky*, Veronica Calvo Cortes and Yassine El Maazouz: Totally positive skew symmetric matrices (Abstract)
• Sarah Brauner, Patricia Grace Commins*, Darij Grinberg and Franco Saliola: The $q$-deformed random-to-random family in the Hecke algebra (Abstract)
• Kieran Calvert, Aram Dermenjian*, Alex Fink and Ben Smith: Quadratic exchange equations for Coxeter matroids (Abstract)
• Ariana Chin*: Classification of Zamolodchikov periodic cluster algebras (Abstract)
• Zawad Chowdhury*, Rekha R. Thomas and Stefan Steinerberger: Graphical Designs find Combinatorial Structures (Abstract)
• Suchakree Chueluecha* and Jennifer Morse: Skew-linked Catalan functions and Genocchi numbers (Abstract)
• Jesús A. De Loera*, Jillian Eddy, Sawyer Jack Robertson and Jose Alejandro Samper Casas: Which Polytopes are Positively Curved? (Abstract)
• Theo Douvropoulos*: Extended Cyclic Sieving Phenomena (Abstract)
• Sergi Elizalde*: Cylindric growth diagrams (Abstract)
• Luis Ferroni, Alejandro Morales* and Greta Panova: Skew shapes, Ehrhart positivity and beyond (Abstract)
• Christian Gaetz* and Yibo Gao: Billey-Postnikov posets (Abstract)
• Neha Shailesh Goregaokar* and Olivier Bernardi: Bijectivity of a generalized Pak-Stanley labeling (Abstract)
• Lazar Guterman* and Eran Nevo: Matroids arising from algebraic shifting (Abstract)
• Álvaro Gutiérrez, Álvaro L. Martínez, Michał Szwej* and Mark Wildon: Plethystic lifts of $q$-binomial identities (Abstract)
• Jon Pål Hamre*, Benjamin Schröter, Lorenzo Vecchi and Emil Verkama: Chow classes of matroids and standard Young tableaux (Abstract)
• Mitsuki Hanada* and Raymond Oliver Chou: A descent basis for the $\Delta$-Springer module (Abstract)
• Florent Hivert, Vincent Pilaud and Ludovic Schwob*: Heaps of rhombic dodecahedra, catalan congruences on alternating sign matrices, and bases of the Temperley–Lieb algebra (Abstract)
• Yakob Kahane*: On two open problems on Ehrhart polynomials of fences (Abstract)
• Siddarth Kannan* and Terry Dekun Song: Pólya enumeration, wreath product symmetric functions, and moduli spaces of curves (Abstract)
• Aaron Lauve and Anthony Aurthur Lazzeroni*: Interpolation in Species and a lift of the Hopf algebra of r-Quasisymmetric Functions (Abstract)
• John Lentfer*: Diagonal supersymmetry for coinvariant rings (Abstract)
• Eric Marberg*: Classical double Grothendieck transitions (Abstract)
• Joseph McDonough*, Pavlo Pylyavskyy and Shiyun Wang: Kirillov–Reshetikhin dual equivalence graphs (Abstract)
• Anastasia Nathanson*: Multipermutohedral Chow rings (Abstract)
• Ethan Partida* and Colin Crowley: Graded Ehrhart Theory of Unimodular Zonotopes (Abstract)
• Nicolas Avila Ramirez*, Luis Ferroni and Alejandro Morales: Luck and magic for Pitman–Stanley polytopes (Abstract)
• Nathan Reading and Tanvi Thummar*: m is for meet congruence (Abstract)
• Marcus Schönfelder*: The 1/4-phenomenon of placement probabilities in the Aztec diamond (Abstract)
• Dawei Shen* and Emanuele Ventura: The ABCT Variety is a Positive Geometry (Abstract)
• Joshua P. Swanson*, Christian Gaetz, Jessica Striker and Haihan Wu: Web bases, pocket complexes, and affine buildings (Abstract)
• Aarush Vailaya* and Foster Tom: The chromatic symmetric function of graphs glued at a single vertex (Abstract)

Poster Session 2

• Antoine Abram, Jose Bastidas, Benjamin Dequêne*, Alejandro Morales, GaYee Park and Hugh Thomas: Flows on cyclic graphs, complete gentle algebras, and the Mutoperhedron (Abstract)
• Alibek Adilzhan* and Damir Yeliussizov: Flagged Hamel-Goulden formulas (Abstract)
• Sota Asai, Osamu Iyama, Kaveh Mousavand* and Charles Paquette: Left modular and extremal lattices through brick-directed algebras (Abstract)
• Spencer Backman, Galen Dorpalen-Barry*, Anastasia Nathanson, Ethan Partida and Noah Prime: Line Shellings of Bergman Fans (Abstract)
• Mohammad Bardestani, Keivan Mallahi-Karai, Samrith Ram and Hadi Salmasian*: Point counting on intersections of adjoint orbits with ad-nilpotent ideals over $\mathbb{F}_q$ (Abstract)
• Jose Bastidas, Sarah Brauner, Mathieu Guay-Paquet, Alejandro Morales, GaYee Park* and Franco Saliola: Factorizations for the Iwahori–Hecke algebra (Abstract)
• Nantel Bergeron, Lucas Gagnon*, Hunter Spink and Vasu Tewari: Introducing the Coxeter flag variety (Abstract)
• Olivier Bernardi and Jonathan J. Fang*: Subgraphs Vs Orientations: infinite families of equidistributions (Abstract)
• Christin Bibby and Peter Ramsey*: The Orlik-Solomon algebra of a locally geometric poset (Abstract)
• Sara Billey, Herman Homan Chau and Kevin Liu*: Commutation classes of reduced words and higher Bruhat orders for affine permutations (Abstract)
• Aram Bingham, Lisa Johnston, Colin Lawson, Rosa Orellana, Jianping Pan* and Chelsea Sato: The Chromatic Symmetric Function for Unicyclic Graphs (Abstract)
• Timothy Russell Blanton*, Jesus A. De Loera and Melissa Sherman-Bennett: On Orbit Realizations of Coxeter Permutahedra (Abstract)
• Jonathan Boretsky* and Zach Walsh: Excluding a line from positroids (Abstract)
• Beth Anne Castellano*, Rosa Orellana and Mike Zabrocki: Transition matrices for character bases of the symmetric group (Abstract)
• Jack Chou*, Linus Setiabrata and Tianyi Yu: Grothendieck polynomials of fireworks and inverse fireworks permutations (Abstract)
• Oliver Clarke, Akihiro Higashitani* and Francesca Zaffalon: Combinatorial Mutation Equivalence of Restricted Chain-Order Polytopes (Abstract)
• Patricia Grace Commins* and Benjamin Steinberg: Invariant theory for left regular bands (Abstract)
• Michele D’Adderio and Alessio Sgubin*: A Loehr-Remmel bijection in the $n \times kn$ grid (Abstract)
• Guilherme Zeus Dantas e Moura* and Olya Mandelshtam: Shape changing identities for permuted-basement nonsymmetric Macdonald polynomials (Abstract)
• Colin Defant, Melissa Sherman-Bennett and Nathan Williams*: Permutahedron Triangulations via Total Linear Stability and the Dual Braid Group (Abstract)
• Jehanne Dousse, Jihyeug Jang* and Frederic Jouhet: Particle motion methods for Andrews–Gordon and Stanton type identities (Abstract)
• Laura Escobar, Patricia J. Klein* and Anna Weigandt: Algebra and geometry of ASM weak order (Abstract)
• Qi Fang, Shishuo Fu*, Haijun Li and Quan Yuan: Parity patterns meet Genocchi numbers: four labelings and three bijections (Abstract)
• Raj Gandhi* and Ethan Partida: Algebraic cobordism rings of wonderful varieties and matroids (Abstract)
• Darij Grinberg, Tom Roby*, Stephan Wagner and Mei Yin: Downs and Ups in the Weyl Algebra (Abstract)
• Zachary Hamaker* and Jesse Kim: Odd Shifted Parking Functions (Abstract)
• Hans Höngesberg*, Matjaz Konvalinka and Martin Rubey: Properties of the quilt lattice (Abstract)
• Elena Hoster* and Christian Stump: Chow polynomials of simplicial posets with positive h-vector are real-rooted (Abstract)
• Daniel Hwang, Juliet Whidden* and Josephine Yu: Computing parametric weighted Ehrhart polynomials of smooth polytopes (Abstract)
• Takashi Imamura*, Matteo Mucciconi, Tomohiro Sasamoto and Travis Scrimshaw: The periodic multi-layer polynuclear growth: Integrability and applications (Abstract)
• Matthew Larson* and Alan Stapledon: Complementary vectors of doubly Cohen-Macaulay complexes (Abstract)
• Ming Yean Lim*: On asymptotics of unitriangular groups (Abstract)
• Igor Makhlin*: Tropical cluster varieties, phylogenetic trees, and generalized associahedra (Abstract)
• Chau Nguyen, Son Nguyen* and Dora Woodruff: Shuffle Tableaux, Littlewood–Richardson Coefficients, and Schur Log-Concavity (Abstract)
• Rosa Paten* and Dora Woodruff: Key Positivity and Temperley-Lieb Immanants (Abstract)
• Andrew Sack*: Lattices from Pointed Building Sets: Generalized Ornamentation Lattices (Abstract)
• Avery St Dizier, Linus Setiabrata* and Tianyi Yu: Generalized orthodontia, punched tableaux, and Lascoux expansion of sheared characters (Abstract)
• Jason Stack*: Parking Spaces for Complex Reflection Groups (Abstract)
• Ada Mead Stelzer*: Surprise polynomiality in algebraic combinatorics (Abstract)
• Rui Xiong* and Yibo Gao: Positivity in triple Schubert calculus (Abstract)

Software Demonstrations

• Leigh Foster*: Tilepaint: visualizations and calculations in tilings, perfect matchings, and $n$-mer covers (Abstract)
• Kyle Huang*, Robert Lauff and Charles Zhang: UniTriSat: Unimodular Triangulations via SATISFIABILITY (Abstract)