Rigid dualizing complexes over quantum homogeneous spaces

Rigid dualizing complexes over quantum homogeneous spaces
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量子齐次空间上的刚性对偶复合体

DOI:
10.1016/j.jalgebra.2011.12.007
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发表时间:
2012-03
期刊:
影响因子:
0.9
通讯作者:
Q. -S. Wu
Q. -S. Wu
中科院分区:
数学3区
文献类型:
--
作者:
L. -Y .Liu;Q. -S. Wu

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一个Hopf代数的量子齐性空间是一个右余理想子代数,在这个子代数上这个Hopf代数是忠实平坦的。证明了一个Hopf代数的Auslander-Gorenstein性质是由它的量子齐性空间继承的。若点Hopf代数H的量子齐性空间B是维数为d的AS-Gorenstein,则B有刚性对偶复形Bν[d]. Nakayama自同构ν由ν=ad(g)[τ]给出,其中ad(g)是与某个类群元素g∈H相关联的内自同构,B的左积分所决定的代数映射.对Uq(sl ~ 2)的量子齐性空间进行了分类,并证明了它们都是Auslander-正则的,AS-正则的和Cohen-Macaulay的.
A quantum homogeneous space of a Hopf algebra is a right coideal subalgebra over which the Hopf algebra is faithfully flat. It is shown that the Auslander–Gorenstein property of a Hopf algebra is inherited by its quantum homogeneous spaces. If the quantum homogeneous space B of a pointed Hopf algebra H is AS-Gorenstein of dimension d, then B has a rigid dualizing complex Bν[d]. The Nakayama automorphism ν is given by ν=ad(g)∘S2∘Ξ[τ], where ad(g) is the inner automorphism associated to some group-like element g∈H and Ξ[τ] is the algebra map determined by the left integral of B. The quantum homogeneous spaces of Uq(sl2) are classified and all of them are proved to be Auslander-regular, AS-regular and Cohen–Macaulay.
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