Untwisting a twisted Calabi-Yau algebra
Untwisting a twisted Calabi-Yau algebra
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DOI:
10.1016/j.jalgebra.2014.02.018
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发表时间:
2013-04
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影响因子:
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通讯作者:
Jake Goodman;U. Kraehmer
中科院分区:
文献类型:
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作者:
Jake Goodman;U. Kraehmer
Abstract Twisted Calabi–Yau algebras are a generalisation of Ginzburg's notion of Calabi–Yau algebras. Such algebras A come equipped with a modular automorphism σ∈ Aut (A), the case σ= id being precisely the original class of Calabi–Yau algebras. The aim of this paper is to give a concise proof of the fact that every twisted Calabi–Yau algebra may be extended to a Calabi–Yau algebra. More precisely, we show that if A is a twisted Calabi–Yau algebra with modular automorphism σ, then the smash (semidirect) product algebras A⋊ σ N and A⋊ σ Z are Calabi–Yau.