Abstract:
<正> 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
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科学通报
Year: 1982
Issue: 12
Page: 765
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WoS CC Cited Count: 0
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