Graded braided commutativity in Hochschild cohomology

Cóppola, Javier - Solotar, Andrea

Resumen:

We prove the graded braided commutativity of the Hochschild cohomology of A with trivial coefficients, where A is a braided Hopf algebra in the category of Yetter- Drinfeld modules over the group algebra of an abelian group, under some finiteness conditions on a projective resolution of A as A-bimodule. This is a generalization of a result by Mastnak, Pevtsova, Schauenburg and Witherspoon to a context which includes Nichols algebras such as the Jordan and the super Jordan plane. We prove this result by constructing a coduoid-up-to-homotopy structure on the aforementioned projective resolution in the duoidal category of chain complexes of A-bimodules. We also prove that the Hochschild complex of a braided bialgebra A in an arbitrary braided monoidal category is a cocommutative comonoid up to homotopy with the deconcatenation product which induces the cup product in Hochschild cohomology.

Detalles Bibliográficos
2022
Este trabajo ha sido financiado por los proyectos UBACYT 20020170100613BA, PIP-CONICET 11220200101855CO y Mathamsud-AREPTHEO. El primer autor mencionado recibió becas doctorales de CAP-UdelaR.
Hochschild cohomology
Nichols algebras
Hopf algebras
Braided monoidal categories
Duoidal categories
Inglés
Universidad de la República
COLIBRI
https://hdl.handle.net/20.500.12008/54926
Acceso abierto
Licencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0)