Finite digraphs with given regular automorphism groups

Finite digraphs with given regular automorphism groups
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DOI:
10.1007/bf02107568
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发表时间:
1980-12
影响因子:
0.8
通讯作者:
L. Babai
L. Babai
中科院分区:
数学4区
文献类型:
--
作者:
L. Babai

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除五种例外情况外,每个有限正则置换群都是有向图的自同构群,推论之一是:给定一个n阶的有限群G,存在一个≤2n+2阶的交换半群S,使得AutS ≠ G。是否存在一个阶≤ Cn且AutL ≠ G的格L(对某个常数C)的问题,仍然是一个未解决的问题.
With five exceptions, every finite regular permutation group occurs as the automorphism group of a digraph.One of the corollaries: given a finite groupGof ordern, there is a commutative semigroupSof order ≤2n+2 such that AutS≅G. The problem whether a latticeLof order ≤Cnwith AutL≅Gexists (for some constantC), remains open.