The CAGE (Combinatorics, Algebra, and Geometry) Seminar


The 2024-2025 CAGE seminar is co-organized by
Jonah Blasiak of Drexel University, Linda Chen of Swarthmore College, Jim Haglund of Penn, Alexander Diaz-Lopez of Villanova University, Darij Grinberg of Drexel University, Liz Milićević of Haverford College, and Mark Skandera of Lehigh University.

Our seminar is back. We meet on Thursdays from 3:30-4:30 pm at either UPenn (usually, but not always, in DRL 4C6 -- note the new room!) or Drexel (Korman 245).

Up-to-date information regarding the location and organization of the seminar will be sent out through the CAGE seminar mailing list the morning of the seminar. To be added to the list, email us at jhaglund "at" math.upenn.edu or darij.grinberg "at" drexel.edu.

See the table below for our schedule for the 2024-2025 Academic year. (See also: CAGE in 2023-2024; CAGE in 2022-2023; CAGE in 2021-2022; Past CAGE Seminars at the UPenn website.)

The 2024-2025 CAGE Seminar Schedule

Date         Time and place              Speaker                                                   Title (click on title to see abstract)
9/24 (!) 3:30, UPenn DRL 4C6 Alan Sokal (University College London) Coefficientwise Hankel-total positivity in enumerative combinatorics
9/26 3:30, Drexel Grant Barkley (Harvard) Beyond weak order on affine Weyl groups
10/10 3:30, UPenn Greta Panova (USC) Computational Complexity in Algebraic Combinatorics
10/17 3:30, UPenn Jennifer Wang (UPenn) Dimensions of the Bigraded Components of Diagonal Harmonics are Polynomials in n
11/7 3:30, UPenn Nikita Borisov (UPenn) Representation stability and stable ranges via monomial expansions
11/13 (!) 11:00 (!), see details Doron Zeilberger (Rutgers) Refined Counting of Binary Trees (Inspired by Werner Krandick)
11/14 3:30, UPenn Tristan Larson (NDSU) Asymptotics of bivariate generating functions with logarithms
1/16 3:30, Drexel Qëndrim R. Gashi (Univ. Prishtina / Univ. Maryland) Maximal cliques of sets of strongly orthogonal roots
1/23 3:30, Drexel Colleen Robichaux (UCLA) Positivity of Schubert coefficients
2/13 3:30, Drexel Lucas Gagnon (York Univ) The quasisymmetric flag variety and equivariant forest polynomials
2/20 3:30, UPenn Steve Melczer (U. Waterloo) Effective Algebraic Computation from Constants to Multivariate Generating Functions
3/6 3:30, Drexel Mark A. Skandera (Lehigh) A generalization of Deodhar's defect statistic for multiplication of Kazhdan-Lusztig basis elements
3/13 3:30, Drexel Patricia Commins (UMN) Left regular bands with symmetry
4/3 3:30, UPenn Katie Waddle (UMich) Spherical friezes
4/10 3:30, UPenn Sarah Brauner (Brown Univ) Crystal skeletons: combinatorics and axioms
4/17 3:30, Drexel Darij Grinberg (Drexel) The one-sided cycle shuffles and their spectra
4/24 3:30, Drexel Yelena Mandelshtam (Berkeley) KP solitons from algebraic curves and the positive Grassmannian
5/1 3:30, Drexel Steven Karp (Univ. Notre Dame) Positivity in real Schubert calculus
5/8 3:30, Drexel Darij Grinberg (Drexel) The random-to-random shuffles and their q-deformations
5/15 3:30, Drexel Ben Adenbaum (FGCU) On the Toggleability Spaces of Diagrams
6/5 3:30, Drexel Tom Roby (UConn) Dynamical algebraic combinatorics: rotating, toggling, whirling, orbiting, averaging
??/?? 3:30, Drexel Franco Saliola (UQAM) TBA