Higher Koszul complexes
Higher Koszul complexes
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DOI:
10.1360/03ys9013
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发表时间:
2003-01
期刊:
影响因子:
--
通讯作者:
Yu Ye;Pu Zhang
中科院分区:
文献类型:
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作者:
Yu Ye;Pu Zhang
In this paper we generalize the Koszul complexes and Koszul algebras, and introduce the higher Koszul (t-Koszul) complexes and higher Koszul algebras, where t > 2 is an integer. We prove that an algebra is t-Koszul if and only if its t-Koszul complex is augmented, i.e. the higher degree (> 1) homologies vanish. For arbitrary t-Koszul algebra Λ we also give a description of the structure of the cohomology algebra ExtΛ• (Λ0, Λ0) by using the t-Koszul complexes, where the Λ0 is the direct sum of the simples