排序方式: 共有13条查询结果,搜索用时 15 毫秒
1.
韩广国 《浙江大学学报(理学版)》2004,31(3):241-244
研究了2-(υ,κ,1)设计的区传递自同构群.特别讨论了2-(υ,5,1)设计的非可解区传递自同构群.得到定理:设G是一个2-(υ,5,1)设计Q的区传递.点本原但非旗传递的自同构群.若G是非可解群.则G的基柱Soc(G)不是典型群PSUn(q),这里q为奇数,n≥3。 相似文献
2.
周胜林 《高校应用数学学报(英文版)》2002,17(1)
§ 1 IntroductionA2 -( v,k,1 ) design D=( Ω,B) is a system consisting of a finite setΩ ofv points anda collection Bofk-subsets ofΩ ,called blocks,such thatany 2 -subsetofΩ is contained inexactly one block.We shall always assume that2 相似文献
3.
A triplane is a ( v, k, 3)-symmetric design. Let G be a subgroup of the full automorphism group of a triplane D. In this paper we prove that if G is flag-transitive and point-primitive, then the socle of G cannot be a simple exceptional group of Lie type. 相似文献
4.
Let D be a 2-(v, k, 4) symmetric design and G be a flag-transitive point-primitive automorphism group of D with X ⊴ G ≤ Aut(X) where X ≅ PSL
2(q). Then D is a 2-(15, 8, 4) symmetric design with X = PSL
2(9) and X
x
= PGL
2(3) where x is a point of D. 相似文献
5.
2-(v,k,1)设计和PSL(3,q)(q是奇数) 总被引:1,自引:0,他引:1
丁士锋 《高校应用数学学报(英文版)》2003,18(3)
§ 1 IntroductionA2 -(v,k,1 ) design D=(S,B) consists ofa finite set Sof v points and a collection Bof some subsets of S,called blocks,such that any two points lie on exactly one blockand each block contains exactly k points.A flag of Dis a pair(α,B) such thatα∈S,B∈Bandα∈B,the set of all flags is denoted by F.We assume that2≤k≤v.An automorphism of Dis a permutation of the points which leaves the set Binvari-ant,all the automorphisms form a group Aut D.Let G be a subgroup of A… 相似文献
6.
受旗传递2-(v,k,3)对称设计和非对称2-(v,k,2)设计有关分类结果的启发,本论文继续研究旗传递非对称2-(v,k,3)设计.文章利用置换群的理论和组合设计的数量性质,借助计算机代数软件Gap和Magma,完全分类了自同构群G旗传递点本原,且基柱Soc(G)为交错群An(n≥5)的非对称2-(v,k,3)设计,证明了此类设计只能是唯一的2-(5,3,3)设计,且G=A_5或S_5. 相似文献
7.
近年来,很多学者研究了以散在单群作为本原自同构群基柱的旗传递2-设计的一些分类工作.本文在此基础之上,给出了以散在单群$M_{11}$作为基柱的旗传递点本原2-设计的完全分类,得到了14个不同构的非平凡2-设计. 相似文献
8.
Haiyan Guan 《代数通讯》2017,45(10):4222-4237
This work is a part of the general program to classify point-primitive finite linear spaces. Let 𝒮 be a non-trivial finite regular linear space with mp points and G≤Aut(𝒮) be point-primitive, here m and p are two primes with m≤p. In this paper, we give a classification of the pairs (G,𝒮). For a small positive integer k≥3 and a non-regular transitive group G on 𝒫, where |𝒫| = v, we also present an algorithm to sift all 2-(v,k,1) designs with point-set 𝒫, and admitting G as an automorphism group. 相似文献
9.
This article is a contribution to the study of block-transitive automorphism groups of 2-(v,k,1) block designs. Let D be a 2-(v,k,1) design admitting a block-transitive, pointprimitive but not flag-transitive automorphism group G. Let kr = (k,v-1) and q = pf for prime p. In this paper we prove that if G and D are as above and q (3(krk-kr + 1)f)1/3, then G does not admit a simple group E6(q) as its socle. 相似文献
10.
若$\cal D$为一个非平凡旗传递点本原对称$(v,k,4)$设计, 其基柱为${\rm PSL}_n(q)$且$G\leq {\rm Aut}(\cal D)$. 那么, $\cal D$ 必为$2$-$(15,8,4)$设计且${\rm Soc}(G)={\rm PSL}_2(9)$. 相似文献