描述了Bn^-型仿射Weyl群a值为5的A2×A11×A12型左胞腔的个数.并计算出当n=7时,这样的左胞腔个数为20个;当n≥8时,左胞腔个数为1/6(2n^3-21n^2+417n-510)个.
This article describes the Type Bn^- affine Weyl group of a value of 5 A2×A11×A12left cell number.When n = 7,and calculated This is left cell number 20;When n ≥ 8,left cell number 1/6(2n^3- 21n^2 +417n- 510).