Decomposition of the adjoint representation of the small quantum $sl_2$
Decomposition of the adjoint representation of the small quantum $sl_2$
复制标题
小量子 $sl_2$ 伴随表示的分解
DOI:
--
复制
发表时间:
1995
期刊:
影响因子:
--
通讯作者:
V.Ostrik
中科院分区:
文献类型:
--
作者:
V.Ostrik
1.1. Given a finite type root datum and a primitive root of unity q = l √ 1, G. Lusztig has defined in [Lu] a remarkable finite dimensional Hopf algebra u over the cyclotomic field Q( l √ 1). It is called a restricted quantum universal enveloping algebra, or a small quantum group. Recall that for a Hopf algebra A with a coproduct ∆, antipode S, and counit ε the adjoint representation is defined in the following way. A is an A-bimodule with respect to left and right multiplication. Using the antipode we can consider A as A⊗A-module. Combining this with the coproduct we get a new structure of A-module on A. It is called the adjoint representation and denoted by ad.