Algebra, Combinatorics, and Geometry Archives
Date  Speakers  

Thursday, April 11, 2024  12:00 to 13:00

Where the tame tori are 
Stephen DeBacker
University of Michigan

Thursday, April 4, 2024  12:00 to 13:00

Computing Crystalline Deformation Rings via the Taylor–Wiles–Kisin Patching Method 
Chengyang Bao
University of Chicago

Thursday, March 28, 2024  12:00

Introduction to toric topology 
Indira Zeinikesheva
University of Pittsburgh

Thursday, March 21, 2024  12:00 to 13:00

From Representations of Affine Algebras to the Quantum Ktheory of Flag Manifolds and Combinatorics 
Cristian Lenart
SUNY Albany

Thursday, March 7, 2024  15:00

Approximations by special values of the Riemann zeta function via cotangent integrals 
Cezar Lupu
Beijing Institute of Mathematical Sciences and Applications

Thursday, February 29, 2024  12:00

Rees and multiRees algebras of direct sums of strongly stable ideals 
Gabriel Sosa
Colgate University

Thursday, February 22, 2024  13:00 to 14:00

Using Heegaard Floer homology and dihedral covers to detect prime knots 
Samantha Allen
Duquesne University

Thursday, February 15, 2024  12:00 to 13:00

Towers of function fields and anumbers 
Joe KramerMiller
Lehigh University

Thursday, February 8, 2024  12:00 to 13:00

On the moving sofa problem 
Jineon Baek
University of Michigan

Thursday, January 11, 2024  12:00 to 13:00

Criteria for pseudorepresentations to arise from genuine representations 
Jinyue Luo
University of Chicago

Tuesday, January 9, 2024  12:00 to 13:00

Character varieties and pseudorepresentations 
Carl WangErickson
University of Pittsburgh

Thursday, December 7, 2023  12:00 to 13:00

What do we learn by formalizing differential topology? 
Patrick Massot
CNRS/ParisSaclay/CMU

Thursday, November 30, 2023  12:00 to 13:00

Notes on the fundamental lemma 
Thomas Hales
University of Pittsburgh

Thursday, November 16, 2023  12:00 to 13:00

Introduction to geometric invariant theory 
Kiumars Kaveh
University of Pittsburgh

Thursday, November 9, 2023  12:00 to 13:00

Normed homological algebra 
Reid Barton
Carnegie Mellon University

Thursday, November 2, 2023  12:00 to 13:00

Cubical setting for discrete homotopy theory 
Chris Kapulkin
Western University (Ontario)

Thursday, October 26, 2023  12:00 to 13:00

Converse theorems for representations of general linear groups over finite fields 
Ashwin Iyengar
John Hopkins University

Thursday, October 19, 2023  12:00 to 13:00

Reflection theorems for number rings 
Evan O'Dorney
Carnegie Mellon University

Thursday, October 12, 2023  12:00 to 13:00

Algebraic Structures in the Reinhardt Problem 
Thomas Hales
University of Pittsburgh

Thursday, September 21, 2023  12:00 to 13:00

Cyclotomic subfields 
Javier GomezCalderon
Point Park University

Thursday, September 14, 2023  12:00 to 13:00

hvector inequalities for weak maps of matroids 
Alex Mason
University of Washington

Thursday, September 7, 2023  12:00 to 13:00

Organizational meeting  
Thursday, April 20, 2023  12:00 to 13:00

Mazur's main conjecture at Eisenstein primes 
Francesc Castella
University of California  Santa Barbara

Thursday, April 13, 2023  12:00 to 13:00

Gauged GromovWitten theory and affine grassmannians 
Andres Fernandez Herrero
Columbia University

Thursday, April 6, 2023  12:00 to 13:00

Around Hall algebras in 50 minutes 
University of Pittsburgh

Thursday, March 30, 2023  12:00 to 13:00

Algebra, combinatorics, and geometry in skein theory 
Peter Samuelson
UC Riverside

Wednesday, March 29, 2023  11:00 to 12:00

Lie theory in tensor categories with applications to modular representation theory 
Pavel Etingof
MIT

Tuesday, March 21, 2023  12:00 to 13:00

Matroids and the geometry of toric vector bundles 
Christopher Manon
University of Kentucky

Thursday, March 16, 2023  12:00 to 13:00

Rational torsion in modular Jacobians 
Preston Wake
Michigan State University

Thursday, March 2, 2023  12:00 to 13:00

Geproci sets: an instance of a new perspective on classification in algebraic geometry 
Brian Harbourne
University of Nebraska

Thursday, February 23, 2023  12:00 to 13:00

Splice type surface singularities and their local tropicalizations 
María Angélica Cueto
Ohio State University

Thursday, February 16, 2023  12:00 to 13:00

Introduction to Matroids, Part II 
Kiumars Kaveh
University of Pittsburgh

Thursday, February 9, 2023  12:00 to 13:00

Introduction to Matroids, Part I 
Kiumars Kaveh
University of Pittsburgh

Thursday, February 2, 2023  12:00 to 13:00

Logarithmic connections and symmetries of bundles 
Mainak Poddar
IISER Pune

Thursday, December 1, 2022  12:00 to 13:00

Viazovska’s work on sphere packings 
Thomas Hales

Thursday, November 17, 2022  12:00

Viazovska’s work on sphere packings 
Thomas Hales

Thursday, November 10, 2022  12:00

Blow Up Chemical Reaction Networks 
KueiNuan Lin
Penn State Greater Allegheny

Thursday, November 3, 2022  12:00 to 13:00

Making big graphs using small varieties 
Boris Bukh
Carnegie Mellon University

Thursday, October 27, 2022  12:00 to 13:00

Let's count things 
Theresa Anderson
Carnegie Mellon University

Thursday, October 13, 2022  12:00 to 13:00

Folded Galleries in Affine Buildings and Moduli of Curves on Flag Varieties 
Elizabeth Milicevic
Haverford College

Thursday, October 6, 2022  12:00 to 13:00

The BorsukUlam theorem in combinatorics and geometry 
Florian Frick
Carnegie Mellon University

Thursday, September 29, 2022  15:00

On the generalized Ramanujan conjecture over function fields 
Michael Harris
Columbia University

Thursday, September 22, 2022  12:00 to 13:00

An Introduction to the Langlands Program (part 2) 
Carl WangErickson
University of Pittsburgh

Thursday, September 15, 2022  12:00 to 13:00

An Introduction to the Langlands Program 
Carl WangErickson
University of Pittsburgh

Thursday, September 1, 2022  12:00 to 13:00

Organizational Meeting  
Thursday, April 21, 2022  11:00

Zagier’s formula for multiple zeta values and its odd variant revisited 
Cezar Lupu
Beijing Institute of Mathematical Sciences and Applications (BIMSA) & Yau Mathematical Sciences Center (YMSC), Tsinghua University

Thursday, April 14, 2022  11:00 to 12:00

Positivity in the quantum K theory of Grassmannians 
Leonardo Mihalcea
Virginia Tech

Thursday, April 7, 2022  11:00

Moduli spaces of stable curves, GromovWitten varieties, and the quantum Ktheory ring 
Bogdan Ion
University of Pittsburgh

Thursday, March 31, 2022  11:00

Hyperelliptic curves, scanning, and moments of quadratic Lfunctions 
Adrian Diaconu
University of Minnesota

Thursday, March 24, 2022  11:00

The moduli space of pointed hyperelliptic curves over finite fields 
Bogdan Ion
University of Pittsburgh

Thursday, March 3, 2022  11:00

Images of skyscraper sheaves on toric resolutions: cohomology distribution 
University of Pittsburgh

Thursday, January 13, 2022  11:00

Toroidal bdivisors and MongeAmpère measures 
Ana Botero
University of Regensburg

Thursday, December 2, 2021  11:00

On the purity conjecture of Nisnevich for torsors under reductive group schemes 
Roman Fedorov
University of Pittsburgh

Thursday, November 18, 2021  11:00

Phylogenetic Networks 
Joseph Cummings
University of Kentucky

Thursday, November 4, 2021  11:00

Extending results of Cayley, Kirchhoff and Tutte 
Gregory M. Constantine

Thursday, October 28, 2021  11:00

The geometric cobordism hypothesis 
Daniel Grady
Texas Tech University

Thursday, October 14, 2021  12:00

Modular Forms, Galois Representations, and Cohomology of Line Bundles 
Aleksander Horawa
University of Michigan

Thursday, September 23, 2021  11:00

Toric schemes over a DVR, vector bundles and affine buildings 
Kiumars Kaveh

Thursday, April 15, 2021  13:00

Prime tropical ideals 
Kalina Mincheva
Tulane University

Thursday, April 8, 2021  13:00

Horoball packing, hidden symmetry and some tetrahedral links 
University of Pittsburgh

Thursday, April 1, 2021  13:00

The Weil Conjectures (Cont.) 
Carl WangErickson
University of Pittsburgh

Thursday, March 25, 2021  13:00

The Weil Conjectures (Cont.) 
Carl WangErickson
University of Pittsburgh

Thursday, March 18, 2021  13:00

The Weil Conjectures 
Carl WangErickson
University of Pittsburgh

Thursday, March 11, 2021  13:00

Graphs of maximal complexity 
Gregory M. Constantine
University of Pittsburgh

Thursday, March 4, 2021  13:00

Counting Gbundles over projective line 
University of Pittsburgh

Thursday, February 25, 2021  13:00

On combinatorics of Arthur's trace formula, convex polytopes, and toric varieties 
Kiumars Kaveh
University of Pittsburgh

Thursday, February 18, 2021  13:00

The Cusp Parameter Function on a Hyperbolic 3Manifold Deformation Variety: An Example, Part 2 
Jason DeBlois
University of Pittsburgh

Thursday, February 11, 2021  13:00

The Cusp Parameter Function on a Hyperbolic 3Manifold Deformation Variety: An Example 
Jason DeBlois
University of Pittsburgh

Thursday, February 4, 2021  13:00

On GHilbert Schemes and McKay Correspondence, Pt. 2 
University of Pittsburgh

Thursday, January 28, 2021  13:00 to 14:00

On GHilbert schemes and McKay correspondence 
University of Pittsburgh

Thursday, March 26, 2020  12:00

TBA 
Milena Wrobel
University of Oldenburg

Monday, March 23, 2020  15:30

Rigid Cocycles and Their Arithmetic 
Jan Vonk
Institute for Advanced Study

Thursday, March 5, 2020  12:00

On the cohomology of congruence subgroups of GL_3 over imaginary quadratic fields 
Dan Yasaki
University of North Carolina at Greensboro

Thursday, February 27, 2020  13:30

Betti numbers and equivariant free resolutions of star configurations 
Federico Galetto
Cleveland State University

Thursday, February 27, 2020  12:00

Varieties of Signature Tensors 
Bernd Sturmfels
UC Berkeley and Max Planck Institute

Thursday, February 20, 2020  12:00

Ktheory of toric varieties 
Aniket Shah
Ohio State University

Thursday, February 13, 2020  12:00 to 13:00

Macdonald polynomials and level two Demazure modules for affine sl(n+1) 
Rekha Biswal
Max Plank Institute, Bonn

Thursday, February 6, 2020  12:00

Conductors and Minimal Discriminants of Hyperelliptic Curves 
Padmavathi Srinivasan
University of Georgia

Thursday, January 30, 2020  12:00 to 13:00

Classification of the irreducible representations of braid groups 
Inna Sysoeva
Binghampton University

Thursday, January 23, 2020  12:00

Equivariant cohomology, momentum graphs and Chinese remainder theorem (cont'd) 
Kiumars Kaveh

Thursday, January 16, 2020  12:00 to 13:00

Equivariant cohomology, momentum graphs and Chinese remainder theorem 
Kiumars Kaveh

Thursday, January 9, 2020  12:00

Applications of DG Homological Algebra in Commutative Algebra 
Saeed Nasseh
Georgia Southern University

Thursday, December 5, 2019  12:00

Keller's Conjecture 
John Mackey

Thursday, November 21, 2019  12:00

Empirical Families of Number Fields 
Ken Manders
University of Pittsburgh

Thursday, November 14, 2019  12:00

Serre weight conjectures for unitary groups 
Karol Koziol

Thursday, November 7, 2019  12:00

Homotopy Canonicity of Homotopy Type Theory 
Chris Kapulkin
Western University

Thursday, October 17, 2019  12:00

On extremal spectra and geometric symmetry in finite structures, with applications 
Gregory M. Constantine
University of Pittsburgh

Thursday, October 3, 2019  12:00

Counting words using the Euler characteristic 
Reid Barton
University of Pittsburgh

Thursday, September 26, 2019  12:00

On noncomputable problems in computer assisted proofs  Why foundations of computations may interest pure mathematicians 
Anders Hansen
University of Cambridge

Thursday, September 19, 2019  12:00

Toric Ideals of Graphs 
Jennifer Biermann
Hobart and William Smith Colleges

Thursday, September 12, 2019  12:00

Modular Forms and Arithmetic 
Carl WangErickson

Tuesday, April 9, 2019  12:00

TBA 
Mahdi Majidi

Tuesday, April 9, 2019  12:00

TBA 
Mahdi Majidi

Thursday, April 4, 2019  12:00

A formalization of forcing and the consistency of the failure of the continuum hypothesis 
Jesse Han

Thursday, March 7, 2019  12:00 to 13:00

MultiplicityFree Products of Schubert Divisors and an Application to Canonical Dimension 
Rostislav Devyatov
University of Alberta

Wednesday, February 27, 2019  12:00

TBA 
Federico Galetto
Cleveland State University

Thursday, February 14, 2019  12:00

Atiyah Class and Sheaf Counting on Local CalabiYau Fourfolds 
Artan Sheshmani
Harvard University, Center for Mathematical Sciences and Applications

Thursday, December 6, 2018  12:00

Hyperplane Arrangements and Compactifying the Milnor Fiber 
Jeremy Usatine
Yale University

Thursday, November 29, 2018  13:00 to 14:00

Toward double affine flag varieties and Grassmannians 
Dinakar Muthiah
Kavli IPMU Tokyo

Thursday, November 29, 2018  12:00

Toric degenerations of the algebra of conformal blocks and compactifications of character varieties 
Chris Manon
University of Kentucky
