Witt group of modular categoriesOberseminar Darstellungstheorie

by Alexei Davydov (Ohio University)

Friday Jul 11, 2025, 2:15 PM → 3:15 PM Europe/Berlin

Endenicher Allee 60/1.008 - Seminarraum (Mathezentrum)

Modular categories (or non-degenerate braided fusion categories) can be thought of as generalisations of quadratic spaces. All essential features of the theory of quadratic spaces have analogues for modular categories. In particular it is possible to define Witt equivalence for modular categories. Witt classes form a group. This group is a convenient tool for classifying modular categories.