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arXiv 1312.0296math.GR
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有限P-群的子群交换度

The subgroup commutativity degree of finite P-groups

Marius Tarnauceanu

摘要:

群G的子群交换度在[6]中被定义为G的两个子群交换的概率,或者等价地,两个子群的乘积又是一个子群。[6]的问题4.3问是否存在除二面体、拟二面体或广义四元数(均为2次幂基数)之外的群族,当群的大小趋于无穷大时,其子群交换度趋于0。Aivazhoun [1,2]对偶特征域上的射影特殊线性群族和单Suzuki群族给出了肯定的回答。在这个简短的说明中,我们指出了具有这个性质的另一族群,即有限P-群。

英文摘要:

The subgroup commutativity degree of a group G has been defined in [6] as the probability that two subgroups of G commute, or equivalently that the product of two subgroups is again a subgroup. Problem 4.3 of [6] asks whether there exist families of groups other than dihedral, quasi-dihedral or generalized quaternion (all of 2-power cardinality), whose subgroup commutativity degree tends to 0 as the size of the group tends to infinity. An affirmative answer to this question has been provided by Aivazidis [1, 2] for the family of projective special linear groups over fields of even characteristic and for the family of the simple Suzuki groups. In this short note we indicate another family of groups with this property, namely the finite P-groups.

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