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arXiv 1702.08669math.RTmath.RA
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基于单态范畴和滤除范畴的Gorenstein投射双模

Gorenstein projective bimodules via monomorphism categories and filtration categories

Wei Hu, Xiu-Hua Luo, Bao-Lin Xiong, Guodong Zhou

摘要:

通过同调定义,将单态范畴从单态关系推广到任意有限维代数。给定两个有限维代数$A$和$B$,利用特殊的单态范畴Mon(B,A-Gproj)刻画了$A$和$B$的张量积上的Gorenstein投射双模.如果两个代数之一是Gorenstein,我们给出了Mon(B,A-Gproj)是Gorenstein投射双模范畴的一个充分和必要条件.另外,如果$A$和$B$都是Gorenstein,那么我们可以通过滤范畴来刻画所有Gorenstein投射双模的范畴.类似地,在这种情况下,我们对无限生成的Gorenstein投射双模也得到了同样的结果。

英文摘要:

We generalize the monomorphism category from quiver (with monomial relations) to arbitrary finite dimensional algebras by a homological definition. Given two finite dimension algebras $A$ and $B$, we use the special monomorphism category Mon(B, A-Gproj) to describe some Gorenstein projective bimodules over the tensor product of $A$ and $B$. If one of the two algebras is Gorenstein, we give a sufficient and necessary condition for Mon(B, A-Gproj) being the category of all Gorenstein projective bimodules. In addition, If both $A$ and $B$ are Gorenstein, we can describe the category of all Gorenstein projective bimodules via filtration categories. Similarly, in this case, we get the same result for infinitely generated Gorenstein projective bimodules.

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