Topology, Algebraic Geometry, and Dynamics Seminar (TADS)
Topology, Algebraic Geometry, and Dynamics Seminar (TADS)
TADS is a venue for presentation/discussion concerning topology, algebraic geometry, or dynamics (broadly understood).
Attendance is open, and those interested in giving a talk should e-mail title/abstract to Yiannis Loizides (yloizide@gmu.edu).
Unless noted otherwise, talks will be on Fridays from 1:30pm - 2:30pm.
In-person: Exploratory Hall, room 4208
Spring 2025
January 31
Lipschitz estimates in Operator Ideals
Ed McDonald, Penn State
February 28
Grothendieck-Springer resolutions and the Moore-Tachikawa conjecture
Peter Crooks, Utah State
March 7
A singular journey with Morse, Bott, Smale, and Witten
Hadrian Quan, UCSC
March 21
The unitary cobordism hypothesis
Luuk Stehouwer, Dalhousie
April 4
Chern classes and exotic G-manifolds
Oliver Wang, UVA
April 11
The fundamental theorem of algebra for varieties
Neil Epstein, George Mason
April 25
Rolling spheres and the exceptional simple Lie group of rank 2
Jacob Erickson, University of Maryland
Past Seminars
Fall 2024
September 20
The compactness problem in generalized Seiberg-Witten theory
Boyu Zhang, University of Maryland
September 27
Higher-dimensional continued fractions
Anton Lukyanenko, GMU
October 18
Combinatorial Diagrams for Lagrangians in CP^2
Sarah Blackwell, University of Virginia
October 25
Arithmeticity and commensurability of links in thickened surfaces
Rose Kaplan-Kelly, GMU
November 1
How to differentiate a Lie infinity-group
Chris Rogers, University of Nevada
November 8
Smooth Models for Fibered Partially Hyperbolic Systems
Margaret Doucette, University of Maryland
November 22
Studying the moduli space of Higgs bundles using topological recursion
Chris Mahadeo, University of Illinois
Spring 2024
January 26
Combinations of parabolically geometrically finite groups
Brian Udall, Rice University
April 19
Differential geometric PDE moduli spaces: derived enhancements, ellipticity and representability
Pelle Steffens,Technische Universität München
Fall 2023
September 15
Understanding equivariant elliptic cohomology for non-abelian Lie groups
David Gepner, Johns Hopkins University
September 29
Geometric and algebraic reduction of multisymplectic manifolds
Casey Blacker, George Mason University
October 13
Riemannian foliations and geometric
quantization
Yiannis Loizides, George Mason University
November 10
Higher scissors congruence invariants for manifolds
Mona Merling, University of Pennsylvania
November 17
The Rarita-Schwinger Operator, from Index Theory to Gauge Theory
Ahmad R.H.S. Sadegh, Northeastern University
Spring 2023
February 10
Solenoids are more interesting than you previously thought
Rodrigo Trevino, UMD
March 24
Geodesic flow on CAT(-1) spaces
Dave Constantine, Wesleyan University
March 31
Discontinuities of the Integrated Density of States for Penrose Laplacians
May Mei, Denison University
April 14
String topology, integrable systems, and noncommutative geometry
Nick Rozenblyum, University of Chicago
April 21
Abstract posted soon
David Gepner, Johns Hopkins
Fall 2022
September 23
Moduli of flat connections on surfaces and the Atiyah-Bott classes
Yiannis Loizides, GMU
September 30
Quantum Field Theory and Derived Differential Geometry (Part I)
David Carchedi, GMU
October 7
Quantum Field Theory and Derived Differential Geometry (Part II)
David Carchedi, GMU
October 14
Frobenius algebras and symplectic categories
Walker Stern, UVA
October 28
Mixed Hodge Structures on Character Varieties of Nilpotent Groups
Sean Lawton, GMU
November 4 - Meeting in Exploratory Hall, room 4106
Sara Maloni, UVA
November 11
A global measure formula and logarithm law for convex real projective structures
Harry Bray, GMU
December 2
Topological Field Theory and Homological Algebra
Chris Elliot, UMass
Spring 2022
March 11 - Special Time: 3:30pm-4:30pm
Dynamics on nilpotent character varieties
Sean Lawton, George Mason University
April 1
Supermanifolds and derived differential geometry
David Carchedi, George Mason University
April 8
Convergence of higher-dimensional continued fractions: Part 2
Anton Lukyanenko, George Mason University
April 15
Plaquette Percolation on the Torus
Benjamin Schweinhart, George Mason University
May 13
Virtual classes of character stacks
Marton Hablicsek, Leiden University
Fall 2020
Friday, December 4, 2020
Chern-Simons theory on cylinders and generalized Hamilton-Jacobi actions
Pavel Mnev, Notre Dame
Friday, November 20, 2020
The higher characteristic polynomial
Cary Malkiewich, Binghamton University
November 13, 2020
Holomorphic SCFTs of small index
Theo Johnson-Freyd, Dalhousie University & Perimeter Institute
Spring 2020
February 28, 2020
A gentle approach to crystalline cohomology
Akhil Mathew, University of Chicago
February 21, 2020
Factorization algebras in topology and physics
Owen Gwilliam, UMass Amhrest
February 7, 2020
Closed affine manifolds with partially hyperbolic linear holonomy
Suhyoung Choi, KAIST
Fall 2019
December 6, 2019
Discretely shrinking targets in moduli space
Grace Work, Girls' Angle and M.I.T.
November 22, 2019
The Peterson Isomorphism: Moduli of Curves and Alcove Walks
Elizabeth Milicevic, Haverford College
November 15, 2019
An introduction to generalized splines
Julianna Tymoczko, Smith College
November 1, 2019
Strings of beads and the equivariant cohomology or Peterson varieties
Brent Gorbutt, George Mason University
October 18, 2019
K-theory stable basis of Springer resolutions
Changlong Zhong, SUNY Albany
October 4, 2019
Positivity determines quantum cohomology
Anders Buch, Rutgers University
September 20, 2019
Cotangent Schubert Calculus
Leonardo Mihalcea, Virginia Tech
September 6, 2019
Algebraic Groups with Good Reduction
Groups with good reduction slides
Andrei Rapinchuk, University of Virginia
Spring 2019
April 26, 2019
Polygon Spaces
Jack Love, George Mason University
April 19, 2019
Special nilpotents and Higher Teichmüller spaces
Brian Collier, University of Maryland, College Park
April 5, 2019
Expanding Thurston maps and visual spheres
Annina Iseli, University of California, Los Angeles
March 22, 2019
Capturing invariance in flows and combinatorial vector fields
Tom Wanner, George Mason University
March 8, 2019
Singularities of commutative rings via test ideals
Rebecca Rebhuhn-Glanz, George Mason University
February 22, 2019
Dynamics and the Clebsch diagonal cubic surface
William Goldman, University of Maryland, College Park
February 8, 2019
How self-driving robots find delivery paths, and how this leads to sub-Riemannian geometry
Anton Lukyanenko, George Mason University
January 25, 2019
Explicit modular forms via the homotopy groups of spheres.
Donald Larson, Catholic University of America
Fall 2018
November 30, 2018
Convex hulls of quasicircles in hyperbolic and anti-de Sitter space
Sara Maloni, University of Virginia
November 16, 2018
Battle Hymn of Discreteness
Caleb Ashley, University of Michigan
November 2, 2018
On some (equivariant) combinatorics related to flag manifolds
Rebecca Goldin, GMU
October 26, 2018
Quasi-isometries of the Baumslag-Gersten group
Tullia Dymarz, University of Wisconsin–Madison
September 28, 2018
Toric Vector Bundles and Piecewise Linear Maps
Christopher Manon, University of Kentucky
September 14, 2018
Ergodicity of Iwasawa continued fractions via markable hyperbolic geodesics
Anton Lukyanenko, GMU
Spring 2018
April 27, 2018 Morse theory and a stack of broken lines
Hiro Lee Tanaka, Harvard University
April 6, 2018 Topological realization of varieties over Spec C((t)) via log geometry
Mattia Talpo, Simon Fraser University
April 6, 2018 Connecting Outreach and Continued Fraction Expansions Through Tessellations
Claire Merriman, UIUC
Special Time: 4:40-5:30pm
March 30, 2018 Representation stability, homological stability, and commuting matrices
Daniel Ramras, Indiana University–Purdue University Indianapolis
March 2, 2018 Hilbert Schemes and the Motivic Sphere Spectrum
Elden Elmanto, Northwestern University
February 23, 2018 Homotopy types of moduli spaces of foliations
David Carchedi, GMU
February 16, 2018 Some results on affine Deligne-Lusztig varieties
Xuhua He, UMCP
February 9, 2018 How to do Multivariable Calculus on Graphs
Tyrus Berry, GMU
January 23, 2018 Poisson Structure on Compactification of Moduli Space of Representations
Sean Lawton, GMU
Fall 2017
November 17, 2017 Lipschitz maps from PI spaces to Carnot groups
Kyle Kinneberg
October 20, 2017 Dirichlet domains in different geometries
Todd Drumm, Howard University
October 13, 2017 Homotopy types as a foundation for mathematics
Emily Riehl, JHU
October 6, 2017 Counting matrices with forced zero entries
Joel Lewis, George Washington University
September 22, 2017 An invitation to the Heisenberg group and its deformations
Anton Lukyanenko, GMU
September 15, 2017 Free products and regularity of group actions
Thomas Koberda, UVA
September 8, 2017 Can rotation numbers be computed from a quasiperiodic trajectory?
Evelyn Sander, GMU
Spring 2017
May 5, 2017 Hyperbolic localization and nearby cycles
Tom Haines, UMCP
April 14, 2017 The Erdos-Szekeres Problem
Valeriu Soltan, GMU
April 7, 2017 Quotient of surface groups and homology of finite covers via Topological Quantum Field Theories
Ramanujan Santharoubane, University of Virginia
March 24, 2017 Invertible Orbifolds over Finite Fields
Marco Aldi, Virginia Commonwealth University
March 10, 2017 Accessing Geometry via Function Spaces
Tyrus Berry, GMU
March 3, 2017 Manifolds, Schemes, Deligne-Mumford stacks, and Orbifolds: Why they’re all topoi.
David Carchedi, GMU
February 17, 2017 Tropical geometry of complexity 1 T -varieties
Chris Manon, GMU
February 10, 2017 Families of Unitary Representations and Kazhdan’s Property (T)
Dan Ramras, IUPUI
February 3, 2017 Compactification of Character Varieties
Sean Lawton, GMU
January 27, 2017 An introduction to 2−Segal spaces
Julie Bergner, UVA
Fall 2016
December 15, 2016 Tropicalization of Configurations of Flags
Ian Le, Perimeter Institute for Theoretical Physics
Special Date/Location: 12/15/16, Fishbowl (4th floor of Exploratory Hall)
December 9, 2016 Operads with homological stability
Sarah Yeakel, University of Maryland
December 2, 2016 SO(p, q)-surface group representations
Brian Collier, University of Maryland
October 28, 2016 Parabolic Higgs Bundles & Generalized Parabolic Higgs Bundles
Marina Logares, Oxford
October 21, 2016 Polyhedra inscribed in quadrics and their geometry
Sara Maloni, University of Virginia
October 14, 2016 Schottky groups and maximal representations
Jean-Philippe Burelle, University of Maryland
September 30, 2016 How to make 3-D printed sculptures of 4-D things. (Public Lecture)
Henry Segerman, Oklahoma State University
Special Location and Time: The HUB Ballroom, 2-3pm presention, 3-4pm book-signing.
September 16, 2016 Introduction to hyperrings and hyperfields
Jaiung Jun, Binghamton University
Spring 2016
May 20, 2016 Positivity in Schubert Calculus, Part 2
Rebecca Goldin, George Mason University
May 13, 2016 Rank 1 Character Varieties
Sean Lawton, George Mason University
April 29, 2016 Positivity in Schubert Calculus
Rebecca Goldin, George Mason University
April 15, 2016 Geometry of the Vinberg’s Enveloping Monoid
Chris Manon, George Mason University
March 21, 2016 Voronoi Tilings and Loop Groups
Pablo Solis , CalTech
March 18, 2016 Algebraic Vision: the Quadrifocal Variety
Luke Oeding, Auburn University
March 4, 2016 The Gauss map and Diophantine approximation in the Heisenberg group
Anton Lukyanenko, University of Michigan
February 19, 2016 Genus of complete intersections in spherical varieties
Kiumars Kaveh, University of Pittsburgh
February 5, 2016 Strange duality of non-abelian theta functions
Swarnava Mukhopadhyay, University of Maryland, College Park
Fall 2015
December 18, 2015 Higgs bundles at the Fuchsian locus
Richard Wentworth, University of Maryland, College Park
December 4, 2015 Algebraic Properties of Skein Algebras of Surfaces
Adam Sikora, State University of New York at Buffalo
November 13, 2015 Stable Representation Theory and Spaces of Flat Connections
Daniel Ramras, Indiana University-Purdue University Indianapolis
November 6, 2015 A new approach to etale homotopy theory
David Carchedi, GMU
October 30, 2015 Geometry and Connectivity of Space of Finite Unit-Norm Tight Frames
Nate Strawn, Georgetown
October 9, 2015 Coordinates for representations of 3-manifold groups
Christian Zickert, University of Maryland, College Park
September 25, 2015 How to pinch a neck on a convex RP2 surface.
John Loftin, Rutgers-Newark
Summer 2015
July 24, 2015 Tropical computational experiments with compactifications of the deformation spaces of convex real projective structures on 2-orbifolds and surfaces
Suhyoung Choi, Korean Advanced Institute of Science and Technology (KAIST)
Spring 2015
April 24, 2015 The space of local overrings of an integral domain
Neil Epstein, George Mason University
April 10, 2015 Equations of tropical varieties
Jeffrey Giansiracusa, Swansea University
March 6, 2015 Proper affine deformations of the one-holed torus
Todd Drumm, Howard University
February 27, 2015 Zeta functions and motivic measures
Niranjan Ramachandran, University of Maryland
February 13, 2015 Complex dynamics and elliptic curves
Laura DeMarco, Northwestern University
January 30, 2015 Representation theory of symplectic singularities
Ben Webster, University of Virginia
Fall 2014
December 3, 2014 Primitive Geodesic Lengths and Arithmetic Progressions
Ben McReynolds, Purdue University
Special Time: 5-6pm
November 19, 2014 Tameness of Margulis Spacetimes
William Goldman, University of Maryland
November 12, 2014 Homotopy of Character Varieties
Sean Lawton, George Mason University
October 29, 2014 The geometry of Euclidean polygons
Chris Manon, George Mason University
October 15, 2014 Counting Points on a Moduli Space
Sean Lawton, George Mason University