Noncommutative fiber products and lattice models

JOURNAL OF ALGEBRA

卷:508

Article

Hartwig, Jonas T.¹ 

[1] Iowa State Univ, Dept Math, Ames, IA 50014 USA

关键词: Representation theory;    Lattice models;    Generalized Weyl algebras;    Weight modules;   

DOI  :  10.1016/j.jalgebra.2018.04.015

来源: Elsevier

【 摘 要 】

We establish a connection between the representation theory of certain noncommutative singular varieties and two-dimensional lattice models. Specifically, we consider noncom mutative biparametric deformations of the fiber product of two Kleinian singularities of type A. Special examples are closely related to the Schrodinger algebra S(1), the affine Lie algebra A(1)((1)), and a finite W-algebra associated to sl(4). The algebras depend on two scalars and two polynomials that must satisfy the Mazorchuk Turowska Equation (MTE), which we re-interpret as a quantization of the ice rule (local current conservation) in statistical mechanics. Solutions to the MTE, previously classified by the author and D. Rosso, can accordingly be expressed in terms of multisets of higher spin vertex configurations on a twisted cylinder. We first reduce the problem of describing the category of weight modules to the case of a single configuration L. Secondly, we classify all simple weight modules over the corresponding algebras A(L), in terms of the connected components of the cylinder minus L. Lastly, we prove that A(L) are crystalline graded rings (as defined by Nauwelaerts and Van Oystaeyen), and describe the center of A(L) explicitly in terms of L. Along the way we prove several new results about twisted generalized Weyl algebras and their simple weight modules. (C) 2018 Elsevier Inc. All rights reserved.

【 授权许可】

Free