Mickelsson Algebras via Hasse Diagrams

IF 0.6 4区 数学 Q3 MATHEMATICS
Andrey Mudrov, Vladimir Stukopin
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引用次数: 0

Abstract

Let \(\mathcal {A}\) be an associative algebra containing either classical or quantum universal enveloping algebra of a semi-simple complex Lie algebra \(\mathfrak {g}\). We present a construction of the Mickelsson algebra \(Z(\mathcal {A},\mathfrak {g})\) relative to the left ideal in \(\mathcal {A}\) generated by positive root vectors. Our method employs a calculus on Hasse diagrams associated with classical or quantum \(\mathfrak {g}\)-modules. We give an explicit expression for a PBW basis in \(Z(\mathcal {A},\mathfrak {g})\) in the case when \(\mathcal {A}=U(\mathfrak {a})\) of a finite-dimensional Lie algebra \(\mathfrak {a}\supset \mathfrak {g}\). For \(\mathcal {A}=U_q(\mathfrak {a})\) and \(\mathfrak {g}\) the commutant of a Levi subalgebra in \(\mathfrak {a}\), we construct a PBW basis in terms of quantum Lax operators, upon extension of the ground ring of scalars to \(\mathbb {C}[[\hbar ]]\).

通过Hasse图的Mickelsson代数
让 \(\mathcal {A}\) 是包含半简单复李代数的经典或量子泛包络代数的关联代数 \(\mathfrak {g}\). 我们给出了米克尔森代数的一个构造 \(Z(\mathcal {A},\mathfrak {g})\) 相对于左理想 \(\mathcal {A}\) 由正根向量生成。我们的方法采用了与经典或量子相关的哈斯图的演算 \(\mathfrak {g}\)-modules。给出了中PBW基的显式表达式 \(Z(\mathcal {A},\mathfrak {g})\) 在这种情况下 \(\mathcal {A}=U(\mathfrak {a})\) 有限维李代数 \(\mathfrak {a}\supset \mathfrak {g}\). 因为 \(\mathcal {A}=U_q(\mathfrak {a})\) 和 \(\mathfrak {g}\) 中的Levi子代数的交换子 \(\mathfrak {a}\),我们将标量的地环推广到,构造了量子Lax算子的PBW基 \(\mathbb {C}[[\hbar ]]\).
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来源期刊
CiteScore
1.30
自引率
0.00%
发文量
61
审稿时长
6-12 weeks
期刊介绍: Algebras and Representation Theory features carefully refereed papers relating, in its broadest sense, to the structure and representation theory of algebras, including Lie algebras and superalgebras, rings of differential operators, group rings and algebras, C*-algebras and Hopf algebras, with particular emphasis on quantum groups. The journal contains high level, significant and original research papers, as well as expository survey papers written by specialists who present the state-of-the-art of well-defined subjects or subdomains. Occasionally, special issues on specific subjects are published as well, the latter allowing specialists and non-specialists to quickly get acquainted with new developments and topics within the field of rings, algebras and their applications.
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