汇报标题 (Title)：Tournament with large domination number（大节造数的较量图）
汇报人 (Speaker)：吴河辉 副教授（复旦大学 上海数学中心）
汇报功夫 (Time)：2023年9月15日 (周五) 10:30
汇报地址 (Place)：校本部E408
约请人(Inviter)：谢齐沁
主办部门：理学院数学系
汇报提要：A famous conjecture of Erdos and Hajnal is equivenent to say that if a tournament has no acyclic set with size n?, then it contains all tournament H with small size as a subtournament . We study the analogous problem on tournaments with large domination number. A tournament H is called rebel if there exists a constant t(H), such that any tournament with domination number at least t(H) contains H as a subtournament. We will show a family of tournaments are rebels. It is joint work with Simiao Liu.
