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arXiv 0903.3295math.RTmath.RA
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分次自内射代数是平凡扩张

Graded self-injective algebras "are" trivial extensions

Xiao-Wu Chen

摘要:

对于正阶化Artin代数$A=\oplus_{n\geq 0}A_n$,引入了它的Beilinson代数$\mathrm{b}(A)$ .证明了若$A$是良分次自内射的,则分次$A$ -模范畴等价于平凡扩张代数$T(\mathrm{b}(A))$上的分次模范畴.因此,存在从$\mathrm{b}(A)$的有界导出范畴到$A$上的分次模的稳定范畴的完全精确嵌入;它是等价的当且仅当第0个分支代数$A_0$具有有限的整体维数。

英文摘要:

For a positively graded artin algebra $A=\oplus_{n\geq 0}A_n$ we introduce its Beilinson algebra $\mathrm{b}(A)$. We prove that if $A$ is well-graded self-injective, then the category of graded $A$-modules is equivalent to the category of graded modules over the trivial extension algebra $T(\mathrm{b}(A))$. Consequently, there is a full exact embedding from the bounded derived category of $\mathrm{b}(A)$ into the stable category of graded modules over $A$; it is an equivalence if and only if the 0-th component algebra $A_0$ has finite global dimension.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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