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arXiv 1605.00560math.QAmath.RA
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代数量子化上的有限维Hopf作用

Finite dimensional Hopf actions on algebraic quantizations

Pavel Etingof, Chelsea Walton

摘要:

设k是特征为零的代数闭域。在与J. Cuadra [arxiv.org/abs/1409.1644,arxiv.org/abs/1509.01165]的联合工作中,我们证明了多项式代数k[z_1,...,z_s]通过一个群作用分解,这实际上对任何有限维的Hopf作用都成立,如果s=0。我们还将这些结果推广到了微分算子代数上的有限维Hopf作用.在这项工作中,我们建立了类似的结果交换域的其他代数量子化的Hopf行动。这包括有限维李代数的泛包络代数、球面辛反射代数、Weyl代数的量子Hamilton约化(特别是量子化的W-varieties)、有限W-代数及其中心约化、量子多项式代数、阿贝尔簇的扭曲齐次坐标环和Sklyanin代数。最后三种情况的推广使用了代数数论的一个结果,这是由于A。佩鲁卡

英文摘要:

Let k be an algebraically closed field of characteristic zero. In joint work with J. Cuadra [arxiv.org/abs/1409.1644, arxiv.org/abs/1509.01165], we showed that a semisimple Hopf action on a Weyl algebra over a polynomial algebra k[z_1,...,z_s] factors through a group action, and this in fact holds for any finite dimensional Hopf action if s=0. We also generalized these results to finite dimensional Hopf actions on algebras of differential operators. In this work we establish similar results for Hopf actions on other algebraic quantizations of commutative domains. This includes universal enveloping algebras of finite dimensional Lie algebras, spherical symplectic reflection algebras, quantum Hamiltonian reductions of Weyl algebras (in particular, quantized quiver varieties), finite W-algebras and their central reductions, quantum polynomial algebras, twisted homogeneous coordinate rings of abelian varieties, and Sklyanin algebras. The generalization in the last three cases uses a result from algebraic number theory, due to A. Perucca.

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