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wM空间的刻画

Characterizations of wM Spaces
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摘要 利用g-函数给出对wM空间的若干等价刻画,主要结论为:X为wM空间当且仅当X满足下述条件之一:(1)存在空间X上的g-函数g,使得若对每一n N,yn∈g(n,p)且g(n,xn)∩g(n,yn)≠,则xn有聚点;(2)存在空间X上的g-函数g,使得若对每一n N,g(n,p)∩g(n,p)≠且xn∈g(n,yn),则xn有聚点。 Some characterizations ofwM-spaces in terms of g-functions are presented. The main result is as follows: X is a wM-space if and only if it satisfies one of the following conditions: (1) there is a g-function g for X such that if yn∈ g(n,p) and g(n, xn) ∩g(n, yn) ≠ Ф for all n ∈ N then (xn) has a cluster point; (2) there is a g-function g for X such that if g(n,p) ∩g(n,yn) ≠ Ф and xn ∈ g(n,yn) for all n ∈ N, then (xn) has a cluster point.
出处 《安徽工业大学学报(自然科学版)》 CAS 2013年第1期98-100,共3页 Journal of Anhui University of Technology(Natural Science)
关键词 G-函数 wM空间 wγ空间 wcc空间 g-functions wMspaces wy spaces wcc spaces
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参考文献8

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