**The photo:** The Louvre and Pont des Arts in Paris.

Here are some slides and notes from talks I have given. For
a more complete list, see my
CV.
## Research talks

*Knot invariants via quantizations of Hecke modifications*

from KIW (slides)

from IPAM (slides)

*Three-dimensional mirror symmetry: a mathematical perspective*

from Perimeter (slides)

*Representation theory of
symplectic singularities*

from Rice (slides)

from Waterloo (slides)

from Cornell (slides)

from Glasgow (slides)

from GMU (slides)

from LSU (slides)

from Imperial (slides)

*Annular homology and Hochschild homology*

from KITT (slides)

*Symplectic duality for hyperk\"ahler quotients*

from the Perimeter Institute (slides)

*Unexpected gradings in representation theory*

from NCSU (slides)

* Gradings on ($q$-)Schur algebras and quiver representations*

from Loyola (slides)

*The discreet charm of the Coulomb branch*

from Warwick (slides)

from the University of Michigan (slides)

from UNC (slides)*Uniqueness (or lack thereof) for categorified
restrictions*

from Mexico City (slides)

from DC AMS meeting (slides)*Generalized category O for symplectic singularities*

from Lyon (slides)
*Category O and KLR algebras*

from Oberwolfach (slides)
*On isomorphisms of categorified sl(n) knot invariants
*

from Zurich (slides)

from Paris (slides)

from Greensboro AMS meeting (slides)

from DC AMS meeting (slides)*Evidence for S-duality from quantization*

from Geneva (slides)
*Pictures of Cherednik algebras*

from Caen (slides)
*Actions of Lie algebras on categories*

Representation Theory Seminar, UC Berkeley (slides)
*Category O for a quiver variety/Representation theory of
symplectic singularities*

From the Simons Center (slides)

From colloquium at Columbia (slides)

From "Representation theory and sympectic algebraic geometry" (slides)

From ``Higher structures, etc.'' (slides: talk one, slides: talk two, slides: talk three)

From ``Geometry of derived categories and representation theory'' (slides)

From the Auslander conference (slides)*How to convert a quiver variety into a categorical action*

From Oberwolfach (slides)
*Categorification and Mirkovic-Vilonen polytopes*

From GASC at Northeastern (slides)

From the SE Lie Theory conference (slides)*Categorification, Lie algebras and topology*

From "25 years of the representation theory of quantum groups" in
Banff (slides)

From the Mike Freedman birthday conference in Berkeley (slides)

From the Workshop on Lie Groups, Lie Algebras and their Representations in Riverside (slides)

From Northeastern (slides).

From the Oregon algebra seminar (slides).*Hypertoric (and other) categories O*

For the RIMS representation theory seminar (slides)
*q-Fock space and quiver Schur algebras*

From the Osaka representation theory seminar (slides).
*Categorifying Reshetikhin-Turaev invariants*

A 3-part series given at the Categorification Meeting in Faro: part I, part II, part III

and a similar version from a small conference at RIMS (slides part I, part II, part III)

from a colloquium I gave at LSU: (slides) and the Lie groups seminar at Cornell (slides)

at the MSRI Knot Homology Research workshop (slides)

at UT Austin (slides)

at the MSRI Knot Homology Introductory workshop (slides)## Expository talks

*Representation theory through the lens of categorical actions*

four lectures in Sydney (Slides: talk 1, talk 2, talk 3).
*Symmetric groups and Lie algebras*

From LSU (slides).
*Untying knots: topology, DNA, and coloring*

From LSU (slides).
*Knot homology and KLR algebras*

from CRM in Montreal (Slides: talk 1, talk 2. Videos: talk 1,
talk 2,
talk 3)
*Course on higher representation theory*

from IHP in Paris. Videos: 1, 2, 3, 4, 5, 6,7, 8, 9, (10 doesn't seem to be posted).

Slides for the lectures: 1, 2, 3, 4, 5, 6, 7, 8, 9.

from IPAM (slides)

from Waterloo (slides)

from Cornell (slides)

from Glasgow (slides)

from GMU (slides)

from LSU (slides)

from Imperial (slides)

from the University of Michigan (slides)

from UNC (slides)

from DC AMS meeting (slides)

from Paris (slides)

from Greensboro AMS meeting (slides)

from DC AMS meeting (slides)

From colloquium at Columbia (slides)

From "Representation theory and sympectic algebraic geometry" (slides)

From ``Higher structures, etc.'' (slides: talk one, slides: talk two, slides: talk three)

From ``Geometry of derived categories and representation theory'' (slides)

From the Auslander conference (slides)

From the SE Lie Theory conference (slides)

From the Mike Freedman birthday conference in Berkeley (slides)

From the Workshop on Lie Groups, Lie Algebras and their Representations in Riverside (slides)

From Northeastern (slides).

From the Oregon algebra seminar (slides).

and a similar version from a small conference at RIMS (slides part I, part II, part III)

from a colloquium I gave at LSU: (slides) and the Lie groups seminar at Cornell (slides)

at the MSRI Knot Homology Research workshop (slides)

at UT Austin (slides)

at the MSRI Knot Homology Introductory workshop (slides)

Slides for the lectures: 1, 2, 3, 4, 5, 6, 7, 8, 9.