On the finite generation of the cohomology of bosonizations

Nicolás Andruskiewitsch; David Jaklitsch; Van C. Nguyen; Amrei Oswald; Julia Plavnik; Anne V. Shepler; Xingting Wang

doi:10.1016/j.jalgebra.2025.10.057

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arXiv · 2506.05267

On the finite generation of the cohomology of bosonizations

Nicolás Andruskiewitsch·David Jaklitsch·Van C. Nguyen·Amrei Oswald·Julia Plavnik·Anne V. Shepler·Xingting Wang

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Abstract

We use deformation sequences of (Hopf) algebras, extending the results of Negron and Pevtsova, to show that bosonizations of some suitable braided Hopf algebras by some suitable finite-dimensional Hopf algebras have finitely generated cohomology. In fact, our results are shown in more generality for smash products. As applications, we prove the bosonizations of some Nichols algebras (such as Nichols algebras of diagonal type, the restricted Jordan plane, Nichols algebras of direct sums of Jordan blocks plus points labeled with 1), by some suitable finite-dimensional Hopf algebras, have finitely generated cohomology, recovering some known results as well as providing new examples.

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BibTeX RIS

Nicolás Andruskiewitsch, David Jaklitsch, Van C. Nguyen, Amrei Oswald, Julia Plavnik, Anne V. Shepler, Xingting Wang. 2025-06-05. On the finite generation of the cohomology of bosonizations. https://doi.org/10.1016/j.jalgebra.2025.10.057

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