无限集的基数  

The cardinal number of infinite set

作　　者：樊恩祥 FAN En-xiang(Retirement Department,Qiqihar University,Heilongjiang Qiqihar 161006,China)

机构地区：[1]齐齐哈尔大学离退休工作处,黑龙江齐齐哈尔161006

出　　处：《齐齐哈尔大学学报（自然科学版）》2022年第6期92-94,共3页Journal of Qiqihar University(Natural Science Edition)

摘　　要：证明了B_(i)^(2)=B_(i)=b_(i)(i=1,2,…);B_(i)^(B_(i))=b_(i+1)(i=1,2,…);B_(2)^^(B_(1))=(B_(2))=b_(2)。The following formulas were proved B_(i)^(2)=B_(i)=b_(i)(i=1,2,…);B_(i)^(B_(i))=b_(i+1)(i=1,2,…);B_(2)^^(B_(1))=(B_(2))=b_(2).

关 键 词：映射集 子集集 乘集 

分 类 号：O144[理学—数学]