超八面体群中最长约化字的循环筛选
Cyclic sieving for longest reduced words in the hyperoctahedral group
摘要:
我们证明超八面体群中最长元素的约化表达式集合R(w_0)表现出循环筛选现象。更具体地说,R(w_0)具有一个自然的循环行动,通过移动一个字的第一个字母到末尾,我们表明,这个行动的轨道结构是由生成函数的主要指标R(w_0)编码。
英文摘要:
We show that the set R(w_0) of reduced expressions for the longest element in the hyperoctahedral group exhibits the cyclic sieving phenomenon. More specifically, R(w_0) possesses a natural cyclic action given by moving the first letter of a word to the end, and we show that the orbit structure of this action is encoded by the generating function for the major index on R(w_0).
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