仿射Coxeter群(-B3,S)可以被看做仿射Coxeter群(-D4,-S)在满足条件α(-S)=-S的某种群自同构α下的不动点集合,设-l是-D4的长度函数,本文明显地刻画了加权Coxeter群(-B3,-l)的所有左胞腔.同时证明了:加权Coxeter群(-D4,-l)和(-B3,-l)的所有左胞腔都是左连通的,所有双边胞腔都是双边连通的。
The affine Coxeter group (-B3,S) can be realized as the fixed point set of the affine Coxeter group (-D4,-S) under a certain group automorphism α with α(-S) =-S.Let -l be the length function of -D4.We gave an explicit description for all the left cells of the weighted Coxeter group (-B3,-L).Also,we showed that in the the weighted Coxeter groups (-D4,-l) and (-B3,-l),each left (respectively,two-sided) cell was left-connected (respectively,two-sided-connected).