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arXiv 0704.2771math.RAmath.QA
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双代数上同调、点霍普夫代数和形变

Bialgebra cohomology, pointed Hopf algebras, and deformations

Mitja Mastnak, Sarah Witherspoon

摘要:

给出了双代数上同调与Hochschild上同调的长正合序列中映射的显式公式。给出了连接同态是满射的一个充分条件。我们应用这些结果来计算某些Radford双积(玻色化)的所有双代数两上循环。这些两个上循环正是那些相关的有限维点霍普夫代数在最近的分类Andruskiewitsch和施耐德,在解释这些霍普夫代数的梯度双代数变形的Radford biproducts。

英文摘要:

We give explicit formulas for maps in a long exact sequence connecting bialgebra cohomology to Hochschild cohomology. We give a sufficient condition for the connecting homomorphism to be surjective. We apply these results to compute all bialgebra two-cocycles of certain Radford biproducts (bosonizations). These two-cocycles are precisely those associated to the finite dimensional pointed Hopf algebras in the recent classification of Andruskiewitsch and Schneider, in an interpretation of these Hopf algebras as graded bialgebra deformations of Radford biproducts.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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