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
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.