Some Algorithms for Nilpotent Permutation Groups
Some Algorithms for Nilpotent Permutation Groups
复制标题
幂零置换群的一些算法
DOI:
--
复制
发表时间:
1997
影响因子:
0.7
通讯作者:
C. Wright
中科院分区:
文献类型:
--
作者:
E. Luks;F. Rakoczi;C. Wright
LetG,HandEbe subgroups of a finite nilpotent permutation group of degreen. We describe the theory and implementation of an algorithm to compute the normalizerNG(H) in time polynomial inn, and we give a modified algorithm to determine whetherHandEare conjugate underGand, if so, to find a conjugating element ofG. Other algorithms produce the intersectionG?Hand the centralizerCG(H). The underlying method uses the imprimitivity structure of ?G,H? and an associated canonical chief series to reduce computation to linear operations. Implementations in GAP and Magma are practical for degrees large enough to present difficulties for general-purpose methods.