■_n型仿射Weyl群a值5的A_(12)×D_2型左胞腔

Left Cells of A_(12)× D_2 with a-Value 5 in the Affine Weyl Group of Type ■_n

描述了■n型仿射Weyl群W的a值为5的一类特殊左胞腔的个数,并计算出当n≥5时,这样的左胞腔含有6n2-14n+12个左胞腔.所使用的方法是找出这类左胞腔中所有特异对合元.

The numbers of left cells with α- value 5 in the affine Weyl group of type D. was determined. There is 6n^2 - 14n ＋ 12 left cells at n≥ 5. The method is to find out all the distinguished involutions.