Cohomology of Graded Twisting of Hopf Algebras

Autor: Xiaolan Yu, Jingting Yang
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Mathematics, Vol 11, Iss 12, p 2759 (2023)
Druh dokumentu: article
ISSN: 2227-7390
DOI: 10.3390/math11122759
Popis: Let A be a Hopf algebra and B a graded twisting of A by a finite abelian group Γ. Then, categories of comodules over A and B are equivalent (but they are not necessarily monoidally equivalent). We show the relation between the Hochschild cohomology of A and B explicitly. This partially answer a question raised by Bichon. As an application, we prove that A is a twisted Calabi–Yau Hopf algebra if and only if B is a twisted Calabi–Yau algebra, and give the relation between their Nakayama automorphisms.
Databáze: Directory of Open Access Journals
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