Block-Transitive 4-(v,k,4) Designs and Ree Groups  

作　　者：Shaojun Dai Ruihai Zhang Shaojun Dai;Ruihai Zhang(Department of Mathematics, Tianjin Polytechnic University, Tianjin, China;Department of Mathematics, Tianjin University of Science and Technology, Tianjin, China)

机构地区：[1]Department of Mathematics, Tianjin Polytechnic University, Tianjin, China [2]Department of Mathematics, Tianjin University of Science and Technology, Tianjin, China

出　　处：《Advances in Pure Mathematics》2016年第5期317-320,共4页理论数学进展（英文）

摘　　要：This article is a contribution to the study of the automorphism groups of  designs. Let be a non-trivial  design where for some positive integer , and  is block-transitive. If the socle of G is isomorphic to the simple groups of lie type, then G is not flag-transitive.This article is a contribution to the study of the automorphism groups of  designs. Let be a non-trivial  design where for some positive integer , and  is block-transitive. If the socle of G is isomorphic to the simple groups of lie type, then G is not flag-transitive.

关 键 词：FLAG-TRANSITIVE BLOCK-TRANSITIVE T-DESIGN Ree Group 

分 类 号：O15[理学—数学]