A quotient stack related to the Weyl algebra

一类量子第二Weyl代数的导子

Derivations of a family of quantum second Weyl algebras

本研究受Dixmier定理启发，将$U_q^+(\frak{g})$的本原商作为Weyl代数的量子类似物，针对$G_2$情形展开研究并计算出其导子李代数，丰富了量子代数领域相关结果。

Twisted generalized Weyl algebras and primitive quotients of enveloping algebras

To each multiquiver $Γ$ we attach a solution to the consistency equations associated to twisted generalized Weyl (TGW) algebras. This generalizes several previously obtained solutions in the literature. We show that the corresponding algebras $\mathcal{A}(Γ)$ carry a canonical representation by differential operators and that $\mathcal{A}(Γ)$ is universal among all TGW algebras with such a representation. We also find explicit conditions in terms of $Γ$ for when this representation is faithful or locally surjective. By forgetting some of the structure of $Γ$ one obtains a Dynkin diagram, $D(Γ)…

比较商变种的Kirwan解析与非交换解析

Comparing the Kirwan and noncommutative resolutions of quotient varieties

本文比较了商变种的Kirwan解析与非交换解析，证明非交换解析的导出范畴可嵌入到Kirwan解析的导出范畴中，并扩展为半正交分解。

The algebra of integro-differential operators on an affine line and its modules

For the algebra $\mI_1= K<x, \frac{d}{dx}, \int>$ of polynomial integro-differential operators over a field $K$ of characteristic zero, a classification of simple modules is given. It is proved that $\mI_1$ is a left and right coherent algebra. The {\em Strong Compact-Fredholm Alternative} is proved for $\mI_1$. The endomorphism algebra of each simple $\mI_1$-module is a {\em finite dimensional} skew field. In contrast to the first Weyl algebra, the centralizer of a non-scalar integro-differential operator can be a noncommutative, non-Noetherian, non-finitely generated algebra which is not a d…

Endomorphisms of quantum generalized Weyl algebras

We prove that every endomorphism of a simple quantum generalized Weyl algebra $A$ over a commutative Laurent polynomial ring in one variable is an automorphism. This is achieved by obtaining an explicit classification of all endomorphisms of $A$. Our main result applies to minimal primitive factors of the quantized enveloping algebra of $U_q(\mathfrak{sl}_2)$ and certain minimal primitive quotients of the positive part of $U_q(\mathfrak{so}_5)$.

Multiparameter Twisted Weyl Algebras

We introduce a new family of twisted generalized Weyl algebras, called multiparameter twisted Weyl algebras, for which we parametrize all simple quotients of a certain kind. Both Jordan's simple localization of the multiparameter quantized Weyl algebra and Hayashi's q-analog of the Weyl algebra are special cases of this construction. We classify all simple weight modules over any multiparameter twisted Weyl algebra. Extending results by Benkart and Ondrus, we also describe all Whittaker pairs up to isomorphism over a class of twisted generalized Weyl algebras which includes the multiparameter …