other enumeration problems lead us to the study of orbits of permutation groups . 其它的计数问题引导我们去研究置换群的轨道。
the permutation group coset method in calculations of gauge field vertices 关于规范场顶角计算的置换群陪集简化方法
regular permutation group 正则置换群
with each recursive step, cross products with one additional permutation group are formed 伴随每个递回步骤,会形成带有一个额外置换群的向量积。
4 . according to the property that all states of a certain cellular automata can build a permutation group, we can design block cipher based on this property 根据有些细胞自动机的所有状态可以构成一个循环群这一特点,指出了利用细胞自动机构造分组密码的方式。