Cofinitary Permutation Groups
主 题: Cofinitary Permutation Groups
报告人: 张羿 (中山大学)
时 间: 2016-04-14 14：30-15：30
地 点: 理科一号楼1114
A permutation on N is called cofinitary iff it has only finitely many fixed points. A subgroup G of Sym(N) is a cofinitary group iff every element in G except identity is cofinitary. We will discuss the cardinality of maximal cofinitary permutation groups, and some related set theoretical problems.