Skew Calabi-Yau property of normal extensions

Skew Calabi-Yau property of normal extensions
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法向延伸的偏斜 Calabi-Yau 性质

DOI:
10.1007/s00229-018-1064-6
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发表时间:
2017-09
影响因子:
0.6
通讯作者:
D.-M. Lu
D.-M. Lu
中科院分区:
数学4区
文献类型:
--
作者:
G.-S. Zhou;Y. Shen;D.-M. Lu

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证明了局部有限正分次代数的斜Calabi-Yau性质在正规扩张下保持不变。我们还得到了一个描述斜Calabi-Yau局部有限正分次代数的Nakayama自同构与其正规扩张之间关系的同调恒等式。作为一个初步的,我们证明了斜Calabi-Yau代数的Nakayama自同构总是发送一个正则正规元到自身的一个单位的倍数。
We prove that the skew Calabi-Yau property is preserved under normal extension for locally finite positively graded algebras. We also obtain a homological identity which describes the relationship between the Nakayama automorphisms of skew Calabi-Yau locally finite positively graded algebras and their normal extensions. As a preliminary, we show that the Nakayama automorphisms of skew Calabi-Yau algebras always send a regular normal element to a multiple of itself by a unit.
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