Higher Koszul complexes

Higher Koszul complexes
复制标题

DOI:
10.1360/03ys9013
复制
发表时间:
2003-01
期刊:
Science in China Series A: Mathematics
影响因子:
--
通讯作者:
Yu Ye;Pu Zhang
Yu Ye;Pu Zhang
中科院分区:
其他
文献类型:
--
作者:
Yu Ye;Pu Zhang

文献摘要

被引文献

相似文献

本文推广了Koszul复形和Koszul代数,引入了高Koszul (t-Koszul)复形和高Koszul代数,其中t bbb20是整数。证明一个代数是t-Koszul的当且仅当它的t-Koszul复形增广,即高次同调消失。对于任意t-Koszul代数Λ,我们也用t-Koszul复合体描述了上同代数ExtΛ•(Λ0, Λ0)的结构,其中Λ0是单复数的直接和
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