Microlocal sheaves and affine Springer fibers

Time:Fri., 9:00-10:30am, Dec.2, 2022

Venue:Zoom ID: 276-366-7254, PW: YMSC

Organizer: Organizers / 组织者 Will Donovan, Penghui Li, Peng Shan, Changjian Su

Speaker:Pablo Boixeda Alvarez (Yale University)


The resolutions of Slodowy slices $\widetilde{\mathcal{S}}_e$ are symplectic varieties that contain the Springer fiber $(G/B)_e$ as a Lagrangian subvariety.

In joint work with R. Bezrukavnikov, M. McBreen and Z. Yun, we construct analogues of these spaces for homogeneous affine Springer fibers. We further understand the categories of microlocal sheaves in these symplectic spaces supported on the affine Springer fiber as some categories of coherent sheaves.

In this talk I will mostly focus on the case of the homogeneous element $ts$ for $s$ a regular semisimple element and will discuss some relations of these categories with the small quantum group providing a categorification of joint work with R.Bezrukavnikov, P. Shan and E. Vasserot.


Pablo Boixeda Alvarez is Gibbs Assistant Professor in Mathematics. His research interests lie in the field of modular representation theory of algebraic groups and related questions. In particular, Boixeda Alvarez’s research has focused on the representation theory of the small quantum group and Frobenius kernels and related geometric questions about certain affine Springer fibers. Prior to joining Yale he was a member at IAS. He received his PhD from MIT.

DATEDecember 2, 2022
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