Talks
Recordings and slides from some of my talks that are available online, newest first. A fuller list of talks is in my CV.
2026
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Symplectic leaves of Coulomb branches
Algebra Seminar, University of Sydney, October 30, 2026
slides -
Symplectic leaves of Coulomb branches
SLMath, Berkeley, October 2, 2026
slides -
3-d mirror symmetry
Summer School: Algebra and Geometry meets Quantum Fields and Strings, September 3, 2026
video -
If you can’t beat ‘em, join ‘em
Researcher Presentations, Perimeter Institute, July 17, 2026
video · slides -
On the geometry of Coulomb branches
Glasgow, May 27, 2026
slides
2025
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iQuantum groups and categorification, II
Diagrammatic Categorification workshop, ICERM, October 21, 2025
video · slides -
Coulomb branches without tears (or affine Grassmannians)
Mathematical Physics Seminar, Perimeter Institute, October 3, 2025
video · slides -
The geometry of Coulomb branches
String-Math 2025, BIMSA, Beijing, June 25, 2025
slides -
Geometry of Coulomb branches
Symplectic Singularities, Supersymmetric QFT, and Geometric Representation Theory, Simons Center for Geometry and Physics, March 31, 2025
video · slides -
The geometry of Coulomb branches
Geometry and Physics Seminar, Fields Institute, February 25, 2025
video -
Gluing constructions for Coulomb branches
Geometry, Algebra and Theoretical Physics Seminar, Imperial College London, January 21, 2025
video -
Modern Algebraic Geometry
Fields Academy Shared Graduate Course, January 2025 (full-semester course)
video playlist
2024
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3d mirror symmetry
Quantization in Representation Theory, Derived Algebraic Geometry, and Gauge Theory, Les Diablerets, September 18, 2024
slides -
The cotangent bundle of the Grassmannian as a Coulomb branch
Informal String-Math Seminar, UC Berkeley, April 29, 2024
video · slides -
Twisted traces and symplectic singularities
Quiver Meetings (online), March 22, 2024
video
2023
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Finite W-algebras as Coulomb branches
Geometric Representation Theory and W-algebras, ICMS, Edinburgh, August 29, 2023
video -
Categorical sl2 actions and RoCK blocks
Categorification in Representation Theory, Sydney, February 15, 2023
video · slides -
Categorical sl2 representations and modular representation theory
Categorification in Representation Theory, Sydney, February 6, 2023 (expository series of 4 lectures)
lecture 1 · lecture 2 · lecture 3 · lecture 4 · slides 1 · slides 2 · slides 3 · slides 4 -
Noncommutative resolutions and Coulomb branches
Representation Theory Seminar, Melbourne, January 18, 2023
slides -
The noncommutative Springer resolution of type A and KLRW algebras
Institute for Mathematical Sciences, NUS, Singapore, January 11, 2023
video · slides
2022
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Mirror symmetry for Coulomb branches
Mirror Symmetry Seminar, ShanghaiTech (online), December 13, 2022
video -
Fun with Coulomb branches
Floer theory of symmetric products and Hilbert schemes, American Institute of Mathematics, December 7, 2022
slides -
Discussion on knot homology
QFT for Mathematicians 2022, Perimeter Institute, June 27, 2022 (panel with Tudor Dimofte and Lev Rozansky)
video -
Coulomb branches and representation theory
Canada-Mexico-USA Conference in Representation Theory, Noncommutative Algebra, and Categorification, Northeastern University, June 12, 2022
slides -
Noncommutative resolutions of Coulomb branches
MIT, April 29, 2022
slides -
Representation theory (and a little bit of quantum field theory)
GPRT Seminar, Northeastern University, April 28, 2022
video · slides -
Hypertoric mirror symmetry
Geometry Seminar, Boston University, April 27, 2022
slides
2021
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Noncommutative resolutions of Coulomb branches
Berkeley String-Math Seminar (online), October 25, 2021
video · slides -
Knot homology from coherent sheaves on Coulomb branches
Perspectives on Knot Homology, BIRS (online), May 20, 2021
slides -
Knot homology and coherent sheaves on Coulomb branches
M-Seminar, Kansas State University (online), April 8, 2021
video -
Symplectic Geometry
Fields Academy Shared Graduate Course, January 2021 (full-semester course)
video playlist
2020
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Hypertoric mirror symmetry
Geometry and Physics Seminar, Northwestern University (online), November 5, 2020
slides -
Coulomb branches and cylindrical KLRW algebras
Learning Seminar on Categorification (online), September 11, 2020 (2 talks)
part 1 · part 2 · slides 1 · slides 2 -
Tensor functors and categorification
Quantum groups, Representation theory, Superalgebras, and Tensor categories (online), August 21, 2020
video -
Howe to translate Gelfand-Tsetlin
QUACKS (online), August 12, 2020
video -
3d mirror symmetry and its discontents
Western Hemisphere Colloquium on Geometry and Physics (online), August 10, 2020
video · slides -
S(ymplectic) duality: where do we stand?
Geometric Representation Theory Seminar, Fields Institute, February 7, 2020
video
2019
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Tilting bundles and 3-dimensional field theory
Mathematical Physics Seminar, Perimeter Institute, September 26, 2019
video · slides -
Mathematical hints of 3-d mirror symmetry
Mathematical Physics Seminar, Perimeter Institute, April 15, 2019
video · slides -
Gelfand-Tsetlin theory and Coulomb branches
CIRM, Luminy, April 1, 2019
video
2017
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An extended category for the BFN construction
Mathematical Physics Seminar, Perimeter Institute, September 25, 2017
video · slides -
Representation theory and the Coulomb branch
Quantum topology and categorified representation theory, Isaac Newton Institute, June 27, 2017
video -
Three-dimensional mirror symmetry: a mathematical perspective
Colloquium, Perimeter Institute, March 2, 2017
video · slides
2013
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Category O for a quiver variety
Workshop on Quiver Varieties, Simons Center for Geometry and Physics, October 17, 2013
video · slides -
Representation theory of symplectic singularities
Worldwide Center of Mathematics, March 2013
video
2011
- Categorification, canonical bases and knot invariants
Perspectives in algebraic Lie theory, Isaac Newton Institute, September 12, 2011
video