Hopf-Galois objects of Calabi-Yau Hopf algebras

Hopf-Galois objects of Calabi-Yau Hopf algebras
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Calabi-Yau Hopf 代数的 Hopf-Galois 对象

DOI:
10.1142/s0219498816501942
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发表时间:
2015-11
影响因子:
0.8
通讯作者:
Xiaolan YU
Xiaolan YU
中科院分区:
数学3区
文献类型:
--
作者:
Xiaolan YU

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利用余群胚的语言证明了具有双射对极的扭Calabi-Yau Hopf代数的Hopf-Galois对象仍然是扭Calabi-Yau,并给出了它们的Nakayama自同构.作为应用,证明了扭Calabi-Yau Hopf代数的分裂Galois对象和非退化双线性型的量子自同构群的Hopf-Galois对象都是扭Calabi-Yau.
By using the language of cogroupoids, we show that Hopf-Galois objects of a twisted Calabi-Yau Hopf algebra with bijective antipode are still twisted Calabi-Yau, and give their Nakayama automorphism explicitly. As applications, cleft Galois objects of twisted Calabi-Yau Hopf algebras and Hopf-Galois objects of the quantum automorphism groups of non-degenerate bilinear forms are proved to be twisted Calabi-Yau.
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