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arXiv 0802.1952math.RTmath.QA
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理想的转移与小幂零轨道的量子化

Transfer of ideals and quantization of small nilpotent orbits

Victor Protsak

摘要:

引入并研究了李代数的约化对偶对的两个成员的泛包络代数的理想之间的转移映射。它的定义的动机是通过Capelli恒等式理论来接近真正的Howe对偶。我们证明,这个地图提供了一个下界的零化子的零化子的θ升降机的陈述与一个固定的零化子理想。我们还表明,在代数稳定的范围内,转让方面的类幂零轨道闭包的量子化。作为应用,我们明确地描述了一般线性和正交李代数的小幂零轨道的量子化,并给出了某些代数微分算子环的表示。我们考虑两个代数版本的豪对偶和重新制定我们的结果在非交换Capelli身份。

英文摘要:

We introduce and study a transfer map between ideals of the universal enveloping algebras of two members of a reductive dual pair of Lie algebras. Its definition is motivated by the approach to the real Howe duality through the theory of Capelli identities. We prove that this map provides a lower bound on the annihilators of theta lifts of representations with a fixed annihilator ideal. We also show that in the algebraic stable range, transfer respects the class of quantizations of nilpotent orbit closures. As an application, we explicitly describe quantizations of small nilpotent orbits of general linear and orthogonal Lie algebras and give presentations of certain rings of algebraic differential operators. We consider two algebraic versions of Howe duality and reformulate our results in terms of noncommutative Capelli identities.

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