摘要
集合有并、交、差、对称差四种基本运算.证明了这四种基本运算不是相互独立的,可以把并、差两种运算(或对称差、差两种运算,或对称差、并两种运算,或对称差、交两种运算)作为两个相互独立的基本运算,其余两种运算可由这两种运算定义.
Set has four basic operations:union,intersection,difference and symmetry difference. It is proved that the four basic operations are not independent, and that Union and intersection(or symmetry difference and difference, or symmetry difference and union , or symmetry difference and intersection) can be regarded as two independent basic operations ,thus the rest can being defined with the two operations.
出处
《哈尔滨师范大学自然科学学报》
CAS
2005年第1期23-24,共2页
Natural Science Journal of Harbin Normal University