吉林大学学报(理学版)

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Hopf-Galois对象的Hochschild维数

俞晓岚   

  1. 杭州师范大学 数学系, 杭州 310036
  • 收稿日期:2015-08-19 出版日期:2016-03-26 发布日期:2016-03-23
  • 通讯作者: 俞晓岚 E-mail:xlyu@hznu.edu.cn

Hochschild Dimensions of HopfGalois Objects

YU Xiaolan   

  1. Department of Mathematics, Hangzhou Normal University, Hangzhou 310036, China
  • Received:2015-08-19 Online:2016-03-26 Published:2016-03-23
  • Contact: YU Xiaolan E-mail:xlyu@hznu.edu.cn

摘要:

采用余群胚的语言讨论Hopf代数的整体维数与其HopfGalois对象的Hochschild维数间的关系. 结果表明, 如果Hopf代数H的整体维数是d, 则H的HopfGalois对象的Hochschild维数≤d.

关键词: Hopf代数, HopfGalois对象, 整体维数, Hochschild维数

Abstract:

Using the language of cogroupoids, we gave the relation between the global dimension of a Hopf algebra and the Hochschild dimensions of its HopfGalois objects. It is shown that the Hochschild dimensions of HopfGalois objects of H are at most d if H is a Hopf algebra with global dimension d.

Key words: Hopf algebra, HopfGalois object, global dimension, Hochschild dimension

中图分类号: 

  • O154