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Abstracts

Week of April 26, 2026

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April 27, 2026
Geometry, Symmetry and Physics [3] Operator Representations, Twisted Traces and the Quantum Hikita Conjecture 4:30pm -
KT 801

Let $X$ and $X^{!}$ be a pair of dual conical symplectic singularities, and let $\tilde{X}^{!} \rightarrow X^{!}$be a symplectic resolution. The quantum Hikita conjecture states that the D-module of graded traces for $X$, is isomorphic to the specialized quantum D-module of $\tilde{X}^{!}$after localization. This talk introduces an operator-theoretic framework to construct these traces and apply them to the conjecture.

We discuss representation of quantized Homological and K theoretic Coulomb branches as operators acting on a two-parameter function space. This concrete representation provides a direct path to constructing integral form twisted traces for conical theories. 

Lastly, I will sketch a proof for a weaker version of the quantum Hikita conjecture by identifying these twisted traces with the vertex functions of quasimaps to the corresponding Higgs branch. This leads to the categorification of Jacobi-Trudi identity at principal specialization.

April 28, 2026
Geometry, Symmetry and Physics [3] Thesis defense: Fourier coefficients of automorphic forms 4:30pm -
KT 801

Abstract: we give a quick introduction to Fourier coefficients of modular forms and their importance in the Langlands program. We then turn to Fourier coefficients of automorphic forms over function fields and explain a micro-local interpretation of Fourier coefficients in this setting. The latter is joint work with Sam Raskin.

Preceded by special tea at 3.50pm in the lounge.

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Links
[1] https://calendar.math.yale.edu/list/calendar/grid/week/abstract/2026-W17 [2] https://calendar.math.yale.edu/list/calendar/grid/week/abstract/2026-W19 [3] https://calendar.math.yale.edu/seminars/geometry-symmetry-and-physics