Positive Casimir and central characters of split real quantum groups

Positive Casimir and central characters of split real quantum groups
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正卡西米尔和分裂实量子群的中心特征

DOI:
10.1007/s00220-016-2639-2
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发表时间:
2016
期刊:
Communication in Mathematical Physics
影响因子:
--
通讯作者:
Ivan Ip
Ivan Ip
中科院分区:
--
文献类型:
--
作者:
Ivan Ip

文献摘要

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本文描述了广义Casimir算子及其在分裂真实的量子群的模二重正表示上的作用。我们引入了虚拟的最高和最低权重的概念,并表明,中央字符承认所有参数的正值。我们表明,他们的形象定义了一个半代数区域界定的真实的点的判别品种独立的q,我们讨论了明确的例子,在较低的秩的情况下。
We describe the generalized Casimir operators and their actions on the positive representationsof the modular double of split real quantum groups. We introduce the notion of virtual highest and lowest weights, and show that the central characters admit positive values for all parameters. We show that their image defines a semi-algebraic region bounded by real points of the discriminant variety independent ofq, and we discuss explicit examples in the lower rank cases.