Taibleson Colloquium: Finding ellipses: Blaschke products and the numerical range
Speaker: Pam Gorkin, Bucknell University
Past Events
Analysis Seminar: Weighted Inequalities and the Testing Philosophy in Harmonic Analysis
Speaker: Troy Roberts, Washington University in St. Louis
Crow Hall, Room 204
Algebraic Geometry and Combinatorics Seminar: Algebraic cycles constructed from curves
Speaker: Wanlin Li, Vanderbilt University
Crow Hall, Room 204
Colloquium: Reductions of abelian varieties
Speaker: Wanlin Li, Vanderbilt University
Louderman Hall, Room 458
Colloquium: Projections of random Cantor sets
Speaker: Alan Chang, Washington University in St. Louis
Cupples I Hall, Room 199
Algebraic Geometry and Combinatorics Seminar: Plane partitions in quantum chemistry
Speaker: Abigail Price, University of Illinois Urbana-Champaign
Cupples I Hall, Room 199
Martin Luther King Jr. Day - no classes
First Day of Classes, Spring 2026
Mathematics Department: Holiday Potluck
Mark your calendars! The WashU Mathematics Department will host a Holiday Potluck on Wednesday, Decmber 10 at 12pm-3pm.
Cupples I Hall, Rooms 199 & 200
Reading Days and Exams - Fall 2025
Math Club: TBD
Cupples I Hall, Room 199
Algebraic Geometry and Combinatorics Seminar: Equivariant gamma-positivity of Chow rings of matroids
Speaker: Hsin-Chieh Liao, Washington University in St. Louis
Crow Hall, Room 206
Analysis Seminar: Harmonic extensions on ℤ × ℕ and a discrete Hilbert transform
Speaker: Ljupcho Petrov, Washington University in St. Louis
Lopata Hall, Room 103
Thanksgiving Break 2025 - no classes
Analysis Seminar: Gradients of single layer potentials for elliptic operators with coefficients of DMO-type and applications to elliptic measure
Speaker: Carmelo Puliatti, Universitat Autònoma de Barcelona
Lopata Hall, Room 103
Geometry & Topology Seminar: Marked boundary rigidity and Anosov extension
Speaker: Dong Chen, Indiana University Indianapolis
Duncker Hall, Room 101
Colloquium: Tropical geometry and curve counting
Speaker: Renzo Cavalieri, Colorado State University
Brown Hall, Room 118
Math Club: Panel Discussion on Graduate Programs in Math
Cupples I Hall, Room 199
Algebraic Geometry and Combinatorics Seminar: Two techniques for understanding the intersection theory of Hurwitz spaces of degree-3 covers
Speaker: Amy Li, University of Texas at Austin
Crow Hall, Room 206
Honors Thesis Presentation: Symplectic Geometry and Quantum Measurement
Speaker: Honglei Jiang, Washington University in St. Louis
Crow Hall, Room 205
Analysis Seminar: scalar and vector valued dyadic operators in the non-homogeneous setting
Speaker: Francesco D'Emilio, Washington University in St. Louis
Lopata Hall, Room 103
Geometry & Topology Seminar: Kähler-Einsten metric, K-stability and moduli of Fano varieties
Speaker: Chenyang Xu, Princeton University
Duncker Hall, Room 101
Roever Colloquium: Kähler-Einsten metric, K-stability and moduli of Fano varieties
Speaker: Chenyang Xu, Princeton University
Brown Hall, Room 118
Math Club: TBD
Crow Hall, Room 204
Algebraic Geometry and Combinatorics Seminar: Quasisymmetric and Coxeter flag varieties
Speaker: Lucas Gagnon, University of Southern California
Crow Hall, Room 206
Analysis Seminar: Nonlinear Projections and Quantitative Rectifiability
Speaker: Krystal Taylor, The Ohio State University
Lopata Hall, Room 103
Geometry & Topology Seminar: Domains of discontinuity for Anosov representations
Speaker: Daniele Alessandrini, Stevens Institute of Technology
Duncker Hall, Room 101
Colloquium: Tropical Algebra
Speaker: Kalina Mincheva, Tulane Unversity
Brown Hall, Room 118
Math Club: TBD
Cupples I Hall, Room 199
Algebraic Geometry and Combinatorics Seminar: Slicing correspondences with high degree hypersurfaces.
Speaker: Ishan Banerjee, The Ohio State University
Crow Hall, Room 206
Analysis Seminar: Attainability of the singular Wiener bound and leaf venation patterns
Speaker: Zhonggan Huang, University of Utah
Lopata Hall, Room 103
Colloquium: TBD
Speaker: Guofang Wei, University of California, Santa Barbara
Brown Hall, Room 118
Math Club: TBD
Cupples I Hall, Room 199
Algebraic Geometry and Combinatorics Seminar: Geometry and topology of universal compactified Jacobians
Speaker: Younghan Bae, University of Michigan
Crow Hall, Room 206
Analysis Seminar: Semi-algebraic discrepancy estimates for skew-shift sequences
Speaker: Matthew Powell, Georgia Institute of Technology
Lopata Hall, Room 103
Taibleson Colloquium: Quantum and classical low degree PAC learning, Harmonic analysis, and dimension-free Remez inequality
Speaker: Alexander Volberg, Michigan State University
Crow Hall, Room 204
Math Club: Magic Squares
Cupples I Hall, Room 199
Algebraic Geometry and Combinatorics Seminar: Homotopical combinatorics and equivariant derived algebraic geometry
Speaker: Kyle Ormsby, Reed College
Crow Hall, Room 206
Analysis Seminar: From Subrepresentation to Sobolev: New Insights
Speaker: Kabe Moen, The University of Alabama
Lopata Hall, Room 103
Geometry & Topology Seminar: The Diederich–Fornæss index and the ∂ ̄-Neumann problem
Speaker: Bingyuan Liu, The University of Texas Rio Grande Valley
Duncker Hall, Room 101
Algebraic Geometry and Combinatorics Seminar: Algebraic vector bundles of rank 2 over smooth affine fourfolds
Speaker: Morgan Opie, Northwestern University
Duncker Hall, Room 101
Colloquium: From knots to 4-manifolds
Speaker: Ciprian Manolescu, Stanford University
Brown Hall, Room 118
Math Club: Magic Squares
Crow Hall, Room 204
Algebraic Geometry and Combinatorics Seminar: Geometric and combinatorial connections between the Delta Theorem and the Rational Shuffle Theorem
Speaker: Maria Monks Gillespie, Colorado State University
Crow Hall, Room 206
Analysis Seminar: Tb Theorem for Singular Integral Operators in the Dunkl Setting
Speaker: Brandon Sweeting, Washington University in St. Louis
Lopata Hall, Room 103
Geometry & Topology Seminar: Reflections on Bubbles and Films
Speaker: Robert Kusner, University of Massachusetts Amherst
Duncker Hall, Room 101
Colloquium: The Arduous Path of AI Models to the Bedside
Speaker: Thomas Kannampallil, Washington University in St. Louis
Brown Hall, Room 118
Fall Break 2025 - no classes
Algebraic Geometry and Combinatorics Seminar: Singularities of Secant varieties
Speaker: Debaditya Raychaudhury, The University of Arizona
Crow Hall, Room 206
Analysis Seminar: Invariant metrics
Speaker: John McCarthy, Washington University in St. Louis
Lopata Hall, Room 103
Math Club: Organizational Meeting
Organizer: Silas Johnson
Cupples I Hall, Room 199
Algebraic Geometry and Combinatorics Seminar: Local inequalities for $cA_k$ singularities
Speaker: Erik Paemurru, Bulgarian Academy of Sciences, Sofia, Bulgaria
Cupples II Hall, Room L009
Analysis Seminar: Polynomials with no zeros on the unit ball
Speaker: Gregory Knese, Washington University in St. Louis
Lopata Hall, Room 103
Geometry & Topology Seminar: Expanding Ricci solitons asymptotic to cones with nonnegative scalar curvature
Speaker: Eric Chen, University of Illinois Urbana-Champaign
Duncker Hall, Room 101
Math Chat: Prof. John McCarthy
Speaker: John McCarthy, Department of Mathematics
Eads Hall, Room 103
Houston Kirk Colloquium: Incidence geometry and tiled surfaces
Speaker: Sergey Fomin, University of Michigan
Brown Hall, Room 118
Algebraic Geometry and Combinatorics Seminar: TBD
Speaker: Stephen Lacina, Truman State University
Crow Hall, Room 206
Analysis Seminar: Hyperbolic Analytic and Algebraic Curves
Speaker: Nic Berkopec, Washington University in St. Louis
Lopata Hall, Room 103
Geometry & Topology Seminar: Torsion Invariants for Hecke Correspondences on Compact Hyperbolic Spaces
Speaker: Yanli Song, Washington University in St. Louis
Duncker Hall, Room 101
Colloquium: Spectral Learning for Dynamical Systems
Speaker: Matthew Colbrook, University of Cambridge
Brown Hall, Room 118
Algebraic Geometry and Combinatorics Seminar: Tight pairs, Kumar's criterion, inversion arrangements, and Bruhat intervals in type A and beyond
Speaker: Alexander Woo, University of Idaho
Crow Hall, Room 206
Analysis Seminar: Critical sets of harmonic functions and Almgren's frequency function
Speaker: Ben Foster, Washington University in St. Louis
Lopata Hall, Room 103
Mathematics Department: Welcome BBQ
Mark your calendars! The WashU Mathematics Department will be hosting a Welcome BBQ, Saturday Sept 6th from 2–7 PM.
Colloquium: Transverse Spheres in Flag Manifolds
Speaker: Parker Evans, Washington University in St. Louis
Cupples I Hall, Room 199
Algebraic Geometry and Combinatorics Seminar: Free curves on Fano varieties
Speaker: Eric Riedl, University of Notre Dame
Cupples I Hall, Room 199
Labor Day 2025 - no classes
Algebraic Geometry and Combinatorics Seminar: d-elliptic loci and quasi-modular forms
Speaker: Carl Lian, Washington University in St. Louis
Cupples I Hall, Room 199
First Day of Classes, Fall 2025
Last Summer Class Session Ends - Summer 2025
Seminar: Two Tales on M_{0,5} and M_{0,6}
Speaker: John Alexander Cruz Morales, Universidad National de Colombia
Cupples I Hall, Room 115
Thesis Defense: Wavelet Representation of Singular Integral Operators
Speaker: Jeremy Cummings, Washington University in St. Louis
Cupples I Hall, Room 111
Independence Day Holiday 2025 - no classes
Seminar: Quasi-Representations of Discrete Groups
Speaker: Guoliang Yu, Texas A&M University
Cupples I Hall, Room 199
Memorial Day Holiday 2025 - no classes
Thesis Defense: Functional Equivariance and Backward Error Analysis
Speaker: Sanah Suri, Washington University in St. Louis
Crow Hall, Room 205
First Summer Class Session Begins - Summer 2025
Commencement 2025
Thesis Defense: The Witten Deformation and Proper Cocompact Lie Group Actions
Speaker: Hao Zhuang, Washington University in St. Louis
Cupples I Hall, Room 216
Thesis Defense: Paraproducts in Two Settings: Hankel Operators and Dyadic Paraproducts
Speaker: Ana Čolović, Washington University in St. Louis
Cupples I Hall, Room 218
Geometry & Topology Seminar: Singular Fibers in Families of Algebraic Curves
Speaker: Jeremy Van-Horn Morris, University of Arkansas
Crow Hall, Room 206
Colloquium: The Topology of Algebraic Singularities
Speaker: Jeremy Van-Horn Morris, University of Arkansas
Crow Hall, Room 205
Reading Days and Exams, Spring 2025
Last Day of Class, Spring 2025
Awards Ceremony, 2025
Cupples I, Rooms 199 + 200
Colloquium: 4/24/25
Speaker: Michael Hartz, Saarland University
Duncker Hall, Room 101
Third Year Major Oral: What do we know about nonregular Hessenberg varieties?
Speaker: Zijing Zhuang, Washington University in St. Louis
Busch Hall, Room 14
Combinatorics Seminar: Ehrhart polynomials of generalized permutohedra from A to B
Speaker: Warut Thawinrak, University of California Davis
Eads Hall, Room 203
Thesis Defense: Studies in Algebraic Cycles: Hodge Theory of Degenerations, Regulators, and Cluster Varieties
Speaker: RJ Acuña, Washington University in St. Louis
Cupples I Hall, Room 111
Geometry & Topology Seminar 4/18/25
Speaker: Jonathan Zung, MIT
Crow Hall, Room 206
Szego Seminar: 4/17/25
Speaker: Pooja Joshi, Washington University in St. Louis
Eads Hall, Room 116
Colloquium: Gross and Zagier’s work revisited
Speaker: Tonghai Yang, University of Wisconsin-Madison
Duncker Hall, Room 101
Harmonic Analysis Working Seminar: 4/16/25
Speaker: Brett Wick, Washington University in St. Louis
Crow Hall, Room 205
K-multimagic squares and magic squares of k-th powers via the circle method
Speaker: Daniel Flores, Purdue University
Crow Hall, Room 205
Combinatorics Seminar: An Erdos-Szekeres Permutation Game
Speaker: Lara Pudwell, Valparaiso University
Eads Hall, Room 203
Sonia Kovalevsky Math Day at WashU
Washington University in St. Louis
Geometry & Topology Seminar: Pappus's Theorem, Patterns of Geodesics, and the Barbot Component
Speaker: Richard Evan Schwartz, Chancellor's Professor of Mathematics, Brown University
Crow Hall, Room 206
Roever Lecture: The optimal paper Moebius band
Speaker: Richard Evan Schwartz, Chancellor's Professor of Mathematics, Brown University
Seigle Hall, Room 109
AAG: A new approach to the extendability of projective varieties: No Gaussian maps
Speaker: Purnaprajna Bangere, University of Kansas
Umrath Hall, Room 140
Harmonic Analysis Working Seminar: 4/9/25
Speaker: Henri Martikainen, Washington University in St. Louis
Crow Hall, Room 205
Third Year Major Oral: Squiggly Circles
Lucas Kerbs, Washington University in St. Louis
Duncker Hall, Room 101
Analysis Seminar: Operator compactness via almost diagonalization
Speaker: Cody Stockdale, Clemson University
Crow Hall, Room 205
Senior Honors Thesis Presentation: Group Actions and Taut Foliations
Speaker: Gabrielle Abato, Washington University in St. Louis
Cupples II, Room 203
Geometry & Topology Seminar: Equivariant conformal harmonic maps from surfaces into rank 2 real buildings
Speaker: John Loftin, Rutgers Newark
Crow Hall, Room 206
Szego Seminar: An introduction to Crouzeix's Conjecture
Speaker: Georgia Corbett, Washington University in St. Louis
Eads Hall, Room 116
Colloquium: Everything I knew about the Stieltjes integral was wrong
Speaker: David Cruz-Uribe, University of Alabama
Duncker Hall, Room 101
AAG: Deformations and automorphisms of Hessenberg varieties
Speaker: Patrick Brosnan, University of Maryland
Umrath Hall, Room 140
Harmonic Analysis Working Seminar: 4/2/25
Speaker: Brett Wick, Washington University in St. Louis
Crow Hall, Room 205
Third Year Major Oral: Knot Invariants from Singular Instantons
Speaker: John Naughton, Washington University in St. Louis
Cupples I, Room 115
Thesis Defense: Oriented Matroid Circuit Polytopes
Speaker: Jodi McWhirter, Washington University in St. Louis
Rudolph Hall, Room 203
Senior Honor Thesis: Balanced partitions of weighted graphs: overview and a topological approach
Speaker: Harutune Davis, Washington University in St. Louis
Duncker Hall, Room 3
Analysis Seminar: Lexicographic functional calculus
Speaker: Evangelos Nikitopoulos, University of Michigan
Crow Hall, Room 205
Geometry & Topology Seminar: Weightings and singular Lie filtrations
Speaker: Yiannis Loizides, George Mason University
Crow Hall, Room 206
Fast Selected Inversion of Sparse Symmetric Matrix and Marginal Variance Calculation
Speaker: Vinh Pham, Washington University in St. Louis
Jolley Hall, Room 539A
Third Year Major Oral: Index Theorem for Hypoelliptic Operators
Speaker: Pooja Joshi, Washington University in St. Louis
Cupples I, Room 113
Colloquium: Classical Diophantine Equations and Orders in Number Fields
Speaker: Shabnam Akhtari, Pennsylvania State University
Duncker Hall, Room 101
Senior Honors Thesis Presentation: Schatten Trace Class and Fredholm Determinant: Report on a Determinant Identity
Speaker: Chris Yao, Washington University in St. Louis
Eads Hall, Room 115
Harmonic Analysis Working Seminar: 3/26/25
Speaker: Walton Green, Washington University in St. Louis
Crow Hall, Room 205
Third Year Major Oral: Entangled Singular Integral Operators
Speaker: Jose Issa Barbara, Washington University in St. Louis
Crow Hall, Room 205
Third Year Major Oral: Smoothing Schubert classes by homogeneous subvarieties
Speaker: Rachel Wu, Washington University in St. Louis
Eads Hall, Room 203
Senior Honors Thesis: Symplectic Geometry: Reduction, Convexity, and Unimodularity
Speaker: Anthony Hong, Washington University in St. Louis
Duncker, Room 3
Szego Seminar: The surprising bridge between geometry and maximal functions
Speaker: Troy Roberts, Washington University in St. Louis
Eads Hall, Room 116
Third Year Major Oral: On the $a$-number and $p$-rank of superelliptic curves over finite fields
Speaker: Mohao Yi, Washington University in St. Louis
Seigle Hall, Room 306
Third Year Major Oral: Rational Curves on Algebraic Varieties in Positive Characteristic
Speaker: Shibashis Mukhopadhyay, Washington University in St. Louis
Cupples II, Room 230
Math Chat: Prof. Rachel Roberts
Mallinckrodt Hall, Room 305
Analysis Seminar: On a Hamilton-Jacobi theory for Hydrodynamic limit of action minimizing collective dynamics
Speaker: Jin Feng, University of Kansas
Crow Hall, Room 205
Combinatorics Seminar: The Maximal Tubings of the Cycle Graph and G-inversions
Speaker: Nathan Lesnevich, Oklahoma State University
Eads Hall, Room 203
Geometry & Topology Seminar: Taut foliations through a contact lens
Speaker: Thomas Massoni, Massachusetts Institute Technology
Crow Hall, Room 206
Szego Seminar: Amenability of groups and operator algebras
Speaker: Hiroto Sasaki, Washington University in St. Louis
Eads Hall, Room 116
Third Year Major Oral: Rolling Equations with Force
Speaker: Zijie Hu, Washington University in St. Louis
Eads Hall, Room 211
Colloquium: What do I do after the colloquium?
Speaker: David Clark, Grand Valley State University
Duncker Hall, Room 101
AAG: Hypergeometric Type Modular Forms
Speaker: Fang-Ting Tu, Louisiana State University
Umrath Hall, Room 140
Harmonic Analysis Working Seminar: 3/5/25
Speaker: Ana Colovic, Washington University in St. Louis
Crow Hall, Room 205
Third Year Major Oral: Finite element hybridization and postprocessing for the Hodge–Dirac problem
Speaker: Marston Xue, Washington University in St. Louis
Eads Hall, Room 204
Combinatorics Seminar: Convex Geometry of Building Sets
Speaker: Rick Danner, University of Vermont
Eads Hall, Room 203
Analysis Seminar: Observability of the heat equation from very small sets
Speaker: Walton Green
Crow Hall, Room 205
Geometry & Topology Seminar: Singular Lagrangian in the Hitchin moduli space and conformal limits
Speaker: Sze Hong Kwong, Maryland University
Crow Hall, Room 206
Colloquium: The many distributions of divisor functions
Speaker: Matilde Lalin, University of Montreal
Duncker Hall, Room 101
Analysis Seminar: The Corona Theorem for Slice Hyperholomorphic Functions
Speaker: Brett Wick, Washington University in St. Louis
Crow Hall, Room 205
Geometry & Topology Seminar: Real Heegaard Floer homology
Speaker: Ciprian Manolescu, Stanford University
Crow Hall, Room 206
Szego Seminar: An introduction to Gromov-Witten invariants
Speaker: Hao Zhuang, Washington University in St. Louis
Eads Hall, Room 116
Colloquium: Geometric Langlands correspondence
Speaker: Nick Rozenblyum, University of Toronto
Duncker Hall, Room 101
AAG Seminar: Algebraic intermediate Jacobians are arithmetic
Speaker: Jeff Achter, Colorado State University
Umrath Hall, Room 140
Analysis Seminar: Determinants of Random Unitary Pencils
Speaker: George Roman, University of Florida
Crow Hall, Room 205
Math & Stats Chat: Prof. Quo-Shin Chi
Mallinckrodt 305
Analysis Seminar: Multilayer Potentials for $\Delta^3$ in Infinitesimally Flat Ahlfors Regular Domains
Speaker: Artur Andrade, Temple University
Crow Hall, Room 205