Northwestern Events Calendar

Aug
6
2025

Thesis Defense | Yuxuan Hu (Northwestern University)

When: Wednesday, August 6, 2025
5:00 PM - 7:00 PM CT

Where: Lunt Hall, 105, 2033 Sheridan Road, Evanston, IL 60208 map it
Webcast Link (Hybrid)

Audience: Faculty/Staff - Student - Post Docs/Docs - Graduate Students

Contact: Yuxuan Hu  

Group: Department of Mathematics: General Interest

Category: Lectures & Meetings

Description:

Title: Elements of Parametrized Sheaf Theory

Abstract: This dissertation develops the foundations for a particular approach to parameterized sheaf theory. We introduce a generalization of sheaf theory that allows the coefficient category to be a local system on the underlying geometric structure.

Given a monodromic ∞-topos X and a functor A from its shape Π∞(X) to PrL, we define the category of twisted sheaves on X valued in A. In particular, this allows us to define twisted sheaves on any locally contractible topological space. This construction recovers ordinary sheaf theory when the coefficient functor A is constant. Furthermore, its subcategory of locally constant objects recovers the category of twisted spectra of Douglas and Hedelund-Moulinos.

Finally, we establish the basic functorial properties of this construction and, to demonstrate that it behaves as expected, we prove the monodromy and exodromy equivalences for twisted sheaves.

Zoom link

Add to Calendar

Add Event To My Group:

Please sign-in