Cluster tilting for higher Auslander algebras
Cluster tilting for higher Auslander algebras
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DOI:
10.1016/j.aim.2010.03.004
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发表时间:
2008-09
影响因子:
1.7
通讯作者:
O. Iyama
中科院分区:
文献类型:
--
作者:
O. Iyama
The concept of cluster tilting gives a higher analogue of classical Auslander correspondence between representation-finite algebras and Auslander algebras. The n-Auslander–Reiten translation functor τnplays an important role in the study of n-cluster tilting subcategories. We study the category Mnof preinjective-like modules obtained by applying τnto injective modules repeatedly. We call a finite-dimensional algebra Λ n-complete if Mn=addM for an n-cluster tilting object M. Our main result asserts that the endomorphism algebra EndΛ(M) is (n+1)-complete. This gives an inductive construction of n-complete algebras. For example, any representation-finite hereditary algebra Λ(1)is 1-complete. Hence the Auslander algebra Λ(2)of Λ(1)is 2-complete. Moreover, for any n⩾1, we have an n-complete algebra Λ(n)which has an n-cluster tilting object M(n)such that [Formula: see text] . We give the presentation of Λ(n)by a quiver with relations. We apply our results to construct n-cluster tilting subcategories of derived categories of n-complete algebras.