正多面体对称群生成元的计算方法

A METHOD FOR THE GENERATORS OF THE SYMMETRY GROUPS OF REGULAR SOLIDS

借助三维正多面体的几何意义,可以直接推导其矩阵生成元,但因在三维空间无法建立真实的正多胞体(regular polytopes,正多面体在更高维空间的推广),该方法难以推广到正多胞体。基于正多面体群的抽象表示,提出了一种纯代数方法计算其矩阵生成元。因该方法完全是符号化的代数计算过程,可以类似推广到高维正多胞体,用于确定高维有限反射群的生成元。

According to the geometrical meaning of the regular solids, we can derive its matrix generators directly. However, it is difficult to achieve the generators of regular polytopes in higher dimension space for there are no visible models. Given an abstract presentation of a regular polyhedral group, we propose a pure algebraic method to establish its generators. The method can be similarly extended to deal with the regular polytopes in higher dimension space.