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math.CT2026
Twisted Deligne products of semisimple tensor categories
Pavel Etingof, Dmitri Nikshych, Victor Ostrik
We discuss the classification of twisted Deligne products of two semisimple tensor categories , i.e., categorifications of the tensor product of their Grothe…
math.CT2026
On the structure of Witt groups and minimal extension conjecture
Theo Johnson-Freyd, Victor Ostrik, Zhiqiang Yu
Let be a Tannakian fusion category. For a braided fusion category over we give sufficient and necessary conditions that char…