On the semisimplicity of Hecke algebras

On the semisimplicity of Hecke algebras
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论赫克代数的半单性

DOI:
10.2969/jmsj/04110075
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发表时间:
1989
影响因子:
0.7
通讯作者:
K. Uno
K. Uno
中科院分区:
数学4区
文献类型:
--
作者:
A. Gyoja;K. Uno

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其中$l$为长度函数[2]。参见[2;第4章,\S 2,例23]关于$H(W, t)$的代数结构。$H(W, t)$在表征理论中的意义见[5]。设$\alpha$是一个复数,$\varphi_{a}$: $C[t]arrow C$是由$\varphi_{a}(t)=\alpha$定义的c代数同态,$H(W, \alpha)=H(W, t)\otimes_{C[t]}(C, \varphi_{\alpha})$。从现在开始,我们假设$W$是有限的,并且(除了最后的注释)不是$A_{1}\cross\cdots\cross A_{1}$类型。设$w_{0}$为$W,$$N=l(w_{0})$中最长的元素,和
where $l$ is the length function [2]. See [2; Chap. 4, \S 2, Ex. 23] for the algebra structure of $H(W, t)$ . See [5] for the significance of $H(W, t)$ in the representation theory. Let $\alpha$ be a complex number, $\varphi_{a}$ : $C[t]arrow C$ the C-algebra homomorphism defined by $\varphi_{a}(t)=\alpha$ , and $H(W, \alpha)=H(W, t)\otimes_{C[t]}(C, \varphi_{\alpha})$ . From now on, we assume that $W$ is finite, and (except in the final remark) not of type $A_{1}\cross\cdots\cross A_{1}$ . Let $w_{0}$ be the longest element of $W,$ $N=l(w_{0})$ , and