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arXiv 1603.09641math.RTmath.ACmath.AGmath.AT
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Hochschild上同调的谱序列与导出范畴的分次中心

Spectral sequences for Hochschild cohomology and graded centers of derived categories

Frank Neumann, Markus Szymik

摘要:

一个微分分次代数或微分分次范畴的Hochschild上同调,允许一个自然映射到它的同调范畴的分次中心:特征同态。我们把它解释为谱序列中的边同态。这给出了一个概念上的解释失败的特征同态是内射或满射,一般。为了说明这一点,我们讨论了对偶数上的模,代数曲线上的相干层,以及与自由闭路空间和弦拓扑有关的例子。

英文摘要:

The Hochschild cohomology of a differential graded algebra, or a differential graded category, admits a natural map to the graded center of its homology category: the characteristic homomorphism. We interpret it as an edge homomorphism in a spectral sequence. This gives a conceptual explanation of the failure of the characteristic homomorphism to be injective or surjective, in general. To illustrate this, we discuss modules over the dual numbers, coherent sheaves over algebraic curves, as well as examples related to free loop spaces and string topology.

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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