Description:


The goal of this session is to bring together mathematicians whose research program involves employing algebraic combinatorics to gain insight on geometric problems and vice-versa.


Session organizers:

  • Theo Douvropoulos (University of Massachusetts)


  • Edward Richmond (Oklahoma State University)


  • Vasu Tewari (University of Hawaii)


    • Important information:

  • Information on registration, lodging and travel can be found here.

  • Conference webpage and program.

  • Conference registration (home base) is at the Integrative Learning Center.

  • If you are driving to campus, parking is available at the Campus Center Parking Garage.

  • We are making dinner reservations for our session at Garcia's Mexican Restaurant for Saturday evening. Please let us know your interest on this google form.


  • Many of you will be staying in hotels in Northampton or along Route 9. The bus service is pretty reliable but --especially for the Route 9 hotels-- you might prefer to catch a ride with a car instead. If you would like a ride or if you can offer a ride, please fill in the appropriate info in the following google sheet.



    • Confirmed speakers:


  • Faqruddin Azam (Oklahoma State University)

  • Spencer Backman (University of Vermont)

  • Jose Bastidas (Université du Québec à Montréal)

  • Sarah Brauner (University of Minnesota)

  • Colin Defant (Harvard University)

  • Christian Gaetz (Cornell University)

  • Shiliang Gao (University of Illinois)

  • Travis Grisby (Oklahoma State Univeristy)

  • Jesse Selover (University of Massachusetts)

  • Iva Halacheva (Northeastern University)

  • Daoji Huang (University of Minnesota)

  • Joshua Kiers (Marian University)

  • Nadia Lafreniere (Dartmouth College)

  • Cristian Lenart (SUNY Albany)

  • Nate Lesnevich (Washington University in St. Louis)

  • Gidon Orelowitz (University of Illinois)

  • Martha Precup (Washington University in St. Louis)

  • Vic Reiner (University of Minnesota)

  • Jordan Weaver (University of Washington)

  • Nathan Williams (University of Texas - Dallas)


    • Schedule:


    Building/Room: Hasbrouch Annex, Room 124
    Saturday morning (October 1):
    8:00-8:20: Christian Gaetz - One-skeleton posets of Bruhat interval polytopes
    8:30-8:50: Colin Defant - Pop, Crackle, and Snap: The Many Facets of Shards
    9:00-9:20: Nathan Williams - Combinatorics and Braid Varieties
    9:30-9:50: Travis M Grigsby - Pattern avoidance and fibre bundle structure on Schubert varieties
    10:00-10:20: Faqruddin Azam - Permutation pattern avoidance and iterated fiber bundle structures on Schubert varieties
    10:30-10:50: Jordan Weaver - Criteria for Smoothness of Positroid Varieties via Pattern Avoidance, Johnson Graphs, and Spirographs
    Saturday afternoon (October 1):
    3:00-3:20: Joshua Kiers - Weight Polytopes of Demazure Modules
    3:30-3:50: Shiliang Gao - Newell-Littlewood numbers
    4:00-4:20: Gidon Orelowitz - The Kostka semigroup and its Hilbert basis
    4:30-4:50: Cristian Lenart - A combinatorial Chevalley formula for semi-infinite flag manifolds and its applications
    5:00-5:20: Daoji Huang - Bumpless Pipe Dream RSK, Growth Diagrams, and Schubert Structure Constants

    Sunday morning (October 2):
    8:00-8:20: Victor Reiner - Invariant theory for the free left-regular band and a q-analogue
    8:30-8:50: Sarah Brauner - On configuration spaces and the peak algebra
    9:00-9:20: Jose Bastidas - The Primitive Eulerian polynomial for simplicial arrangements
    9:30-9:50: Nathan Lesnevich - A Proof of an Immanant Conjecture for Hook Partitions
    10:00-10:20: Jesse Selover - On the Newton Polytopes of Chromatic Symmetric Functions
    10:30-10:50: Martha Precup - Divisible tableaux and the geometry of Springer fibers
    Sunday afternoon (October 2):
    2:00-2:20: Spencer Backman - Higher Categorical Associahedra (joint work with Nathaniel Bottman and Daria Poliakova)
    2:30-2:50: Iva Halacheva - Self-dual puzzles in Schubert calculus and Lagrangian correspondences
    3:00-3:20: Nadia Lafrenière - A study of homomesies on permutations using the FindStat database