Braided Hochschild cohomology and Hopf actions

Braided Hochschild cohomology and Hopf actions
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辫状 Hochschild 上同调和 Hopf 作用

DOI:
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发表时间:
2015
影响因子:
0.9
通讯作者:
C. Negron
C. Negron
中科院分区:
数学3区
文献类型:
--
作者:
C. Negron

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我们表明,编织Hochschild上同调,代数在适当的代数编织monoidal范畴,承认一个分次环结构下,它是编织交换。然后,我们给出了一个典型的标识之间的通常Hochschild上同调环的smash产品和(导出)不变量的辫子Hochschild上同调环。我们应用我们的结果,以确定相关的形式变形理论的粉碎产品与其正式的变形理论作为一个模代数在给定的Hopf代数(当Hopf代数是充分半单的)。作为第二个应用程序,我们推导出一些结构的结果通常Hochschild上同调的粉碎产品,并讨论了具体的影响有限群行动光滑仿射计划。
We show that the braided Hochschild cohomology, of an algebra in a suitably algebraic braided monoidal category, admits a graded ring structure under which it is braided commutative. We then give a canonical identification between the usual Hochschild cohomology ring of a smash product and the (derived) invariants of its braided Hochschild cohomology ring. We apply our results to identify the associative formal deformation theory of a smash product with its formal deformation theory as a module algebra over the given Hopf algebra (when the Hopf algebra is sufficiently semisimple). As a second application we deduce some structural results for the usual Hochschild cohomology of a smash product, and discuss specific implications for finite group actions on smooth affine schemes.
DOI: 10.1016/j.aim.2016.10.025
发表时间: 2017
影响因子: 1.7
作者:
Brodzki J
通讯作者: Brodzki J