讨论了马体群旗传递作用于斯坦诺5设计上的情况,得到了如下结论:设D=(X,Ω,I)是非平凡的斯坦诺5设计,D的自同构群G旗传递地作用在D上。若G是几乎单群,则 (i)基柱Soc(G)不是下列单群:N=Mv,v=11,22,23和N=M11,v=12 (ii)若N=M12,v=12,则D是一个5-(12,6,1)设计,且G M12 (iii)若N=M24,v=24,则D是一个5-(24,8,1)设计,且G M24。
Mathieu groups acted on the Steiner 5 designs flag- transitivly were discussed,and the following results were obtained: Let D = ( X, Ω, I) be a non - trivial Steiner 5 design, and G be a flag - transitive automorphism group of D, if G is simple type,then (i)Soc(G) is not N= Mv ,v= 11,22,23 and N= M11 ,v= 12; (ii)If N= M12, v = 12,then D is a Steiner 5 - (12,6,1) design,and G M12 ; (iii)If N= M24,v=24,the D is a Steiner 5- (24,8,1) design,and G M24