Hopf 2-cocycles of type A2
Abstract
We compute the Hopf 2-cocycles involved in the classification of pointed Hopf algebras of diagonal type A2. When the quantum Serre relations are deformed, we characterize those cocycles that can be recovered from Hochschild cohomology, via exponentiation. We identify some hypotheses that allow us to present general formulas that apply in our setting.
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