Symmetric abelian group-invariant Steiner quadruple systems
Symmetric abelian group-invariant Steiner quadruple systems
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对称阿贝尔群不变斯坦纳四元组
DOI:
10.1016/j.jcta.2021.105435
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Lu Xiao-Nan
中科院分区:
文献类型:
--
作者:
Ji Lijun;Lu Xiao-Nan
Let K be an abelian group of order v. A Steiner quadruple system of order v (SQS (v))(K, B) is called symmetric K-invariant if for each B∈ B, it holds that B+ x∈ B for each x∈ K and B=− B+ y for some y∈ K. When the Sylow 2-subgroup of K is cyclic, a necessary and sufficient condition for the existence of a symmetric K-invariant SQS (v) was given by Munemasa and Sawa, which is a generalization of a necessary and sufficient condition for the existence of a symmetric cyclic SQS (v) shown in Piotrowski's thesis in 1985. In this paper, we prove that a symmetric K-invariant SQS (v) exists if and only if v≡ 2, 4 (mod 6), the order of each element of K is not divisible by 8, and there exists a symmetric cyclic SQS (2 p) for any odd prime divisor p of v.
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DOI:
10.1016/0012-365x(89)90369-5
发表时间:
1989-09
期刊:
Discret. Math.
影响因子:
--
作者:
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通讯作者:
H. Siemon
DOI:
10.1007/bf02941286
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1979
期刊:
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
影响因子:
--
作者:
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通讯作者:
Egmont Köhler
影响因子:
0.7
作者:
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通讯作者:
Yanxun Chang;Bingli Fan;Tao Feng;D. Holt;P. Östergård
DOI:
10.1007/3-540-31703-1_3
发表时间:
2018-10
期刊:
Series and Products in the Development of Mathematics
影响因子:
--
作者:
J. Gallian
通讯作者:
J. Gallian
影响因子:
1.6
作者:
Chen, Jingyuan;Ji, Lijun;Li, Yun
通讯作者:
Li, Yun