%0 Journal Article
%T 一些集合的基数
%A 杨安洲
%J 科学通报
%D 1982
%I 
%X X是集合,令T(X)={ψ:ψ∈X~X∧ψ是双射}。定义X上的等价关系R与S是同类的,且记为R～S,若存在ψ∈T(X)使得
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=7C7E63796F062382A606A3A9833B8C05&jid=B40D4BA57FF46E45205A09B4DC283152&aid=BB34E682B065497FAB5B870F9AC1437A&yid=3F3D540C9B7906DE&vid=DB817633AA4F79B9&iid=59906B3B2830C2C5&sid=849F08713EB6820A&eid=849F08713EB6820A&journal_id=0023-074X&journal_name=科学通报&referenced_num=0&reference_num=0