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Author:

杨安洲 (杨安洲.)

Abstract:

<正> 令X={1,2,…,n},n是自然数,∑_n={φ:φ是X上的一一对应},若S是集合,则用|S|表示S的基数(S中元素的个数)。 问题1 令m≥1,m是自然数,F_m={f:f是定义在X上取值在X内(包括上的)的m元函数},对于f,g∈F_m定义f~g iff(当且仅当)(?φ∈Σ_n)(g(x_1,x_2,…,x_m)=f(φ(x_1),

Keyword:

有限集合

Author Community:

  • [ 1 ] 北京工业大学应用数学系

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Source :

北京工业大学学报

Year: 1992

Issue: 03

Page: 96

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

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Chinese Cited Count:

30 Days PV: 0

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