3 papers
math.QA2025
Hopf 2-cocycles of type
José Ignacio Sánchez
We compute the Hopf 2-cocycles involved in the classification of pointed Hopf algebras of diagonal type . When the quantum Serre relations are deformed, we characterize those…
math.QA2022
Hopf cocycles associated to pointed and copointed deformations over S3
Agustin Garcia Iglesias, Jose Ignacio Sanchez
We present an explicit description of the Hopf 2-cocycles involved in the classification of finite dimensional pointed and copointed Hopf algebras over the symmetric group on three…
math.QA2021
On the computation of Hopf 2-cocycles, with an example of diagonal type
Agustín García Iglesias, José Ignacio Sánchez
We present a framework for the computation of the Hopf 2-cocycles involved in the deformations of Nichols algebras over semisimple Hopf algebras. We write down a recurrence formula…