Positive Casimir and central characters of split real quantum groups
Positive Casimir and central characters of split real quantum groups
复制标题
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:
影响因子:
--
通讯作者:
Ivan Ip
中科院分区:
文献类型:
--
作者:
Ivan Ip
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.