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1.
In the first part of this note, we mainly prove that monotone metacompactness is hereditary with respect to closed subspaces and open Fó-subspaces. For a generalized ordered (GO)-space X, we also show that X is monotonically metacompact if and only if its closed linearly ordered extension X* is monotonically metacompact. We also point out that every non-Archimedean space X is monotonically ultraparacompact. In the second part of this note, we give an alternate proof of the result that McAuley space is paracompact and metacompact.  相似文献   

2.
We get the following result. A topological space is strongly paracompact if and only if for any monotone increasing open cover of it there exists a star-finite open refinement. We positively answer a question of the strongly paracompact property.  相似文献   

3.
证明了 GO-空间子空间的正交紧性和弱子正交紧性是等价的 .  相似文献   

4.
证明了不可数多个GO-空间的乘积是k-仿紧空间(相似文献   

5.
马利文 《数学进展》2012,(2):249-252
本文证明了最小线性序紧化中点的共尾数不超过ω1的有限个GO-空间的乘积是遗传集体Hausdorff空间。  相似文献   

6.
  总被引:2,自引:0,他引:2       下载免费PDF全文
It is shown that if is compact then every subspace of is a -space in the sense of E. van Douwen, which positively answers Matveev's question. A connection between the -property and Baturov's and Grothendieck's classical theorems about function spaces over compacta is established.

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7.
早在1 95 4年,Gillman和Henriksen就证明了一个GO-空间是仿紧空间的充分必要条件,那么,更一般地,任给一个正则不可数基数κ,GO-空间是κ-仿紧空间的充分必要条件是什么呢?本文回答了这个问题.  相似文献   

8.
涂振坤  瞿娟 《大学数学》2007,23(4):92-95
得到了如下结果:设X是逆系统{Xα,παβ,Λ}的逆极限,|Λ|=λ,假设每个映射πα∶X→Xα是开的且到上的,X是λ-仿紧,每个Xα是正规可数仿紧的,则X是正规可数仿紧的.进一步得到了关于遗传正规且遗传可数仿紧空间的类似结果.  相似文献   

9.
数学家 N.Kemoto,T.Nogura,K.D.Sm ith和 Y .Yajim a 1996年证明了两个序数乘积的子空间的正规性、集体正规性、收缩性是等价的 .本文把这个命题进行了推广 ,得到了两个 GO -空间乘积的任意子空间的正规性、集体正规性、收缩性是等价的 .  相似文献   

10.
我们知道,GO-空间乘积的子空间不一定仿紧.在2000年,数学家N.Kemoto,K.Tamano和Y.Yajima证明了两个特殊的GO-空间-序数乘积子空间的仿紧性的一个充分必要条件.把这个定理进行了推广,到了两个一般的GO-空间乘积的任意子空间仿紧性的一个充分必要条件.  相似文献   

11.
马利文  王尚志 《数学学报》2004,47(1):141-148
本文得到了任意两个GO-空间乘积正规性的一个充要条件.  相似文献   

12.
We give an explicit construction of the completely regular paracompact reflection pL of a completely regular locale L described as a sublocale of the Stone-tech compactification βL of L.  相似文献   

13.
马利文  王尚志 《数学学报》2002,45(2):399-404
本文是在日本数学家Kemoto 1993年所作的关于一个GO-空间(广义线性序空间)和一个正则不可数基数乘积正规性的结果的基础上作了进一步的推广,得到了两个GO-空间乘积的正规性的一个更一般的结果.  相似文献   

14.
    
In this paper, we prove that if a perfect GO-space has a -discrete dense set, then has a perfect linearly ordered extension. This answers a problem raised by H. R. Bennett, D. J. Lutzer and S. Purisch. And the result is also a partial answer to an old problem posed by H. R. Bennett and D. J. Lutzer.

  相似文献   


15.
    
Generalizing results of Yang Gao, Lei Mou and Shangzhi Wang, as well as a result of the author, we prove that a topological space is locally compact and metacompact if and only if its product with every compact space is base-cover metacompact.  相似文献   

16.
    
In this paper we construct inverse systems of which each space is strongly paracompact and each bonding map and each projection are open and onto maps, and the limit space is paracompact and not strongly paracompact and we investigate -refinability-like properties of limit spaces of inverse systems.

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17.
张昌斌  李岱 《数学季刊》1998,13(3):81-85
Thispaperiscontinuationsof[1],westilltousemarksandtermsin[1]andtheothertermsagreewith[2]and[3].LetEandFbetwoHausdorfftopologicalvectorspaces,XE,YFbetwononemptysets,FbethedualspaceofF,A:X→2YandB:Y→2Fbetwoset-valuedmapping,T:Y→Xbeinvertible.Inthisp…  相似文献   

18.
20 0 0年 ,数学家 N .Kemoto,K.Tam ano和 Y.Yajima证明了两个特殊的 GO-空间——序数乘积子空间的亚紧性 ,screenability,弱 submetalindelof性是等价的 .本文把这个命题推广到了两个一般的 GO-空间乘积的任意子空间上 ,证明了它们仍然是等价的 .  相似文献   

19.
借助于文(1)中的结论研究了仿紧集上的拟-似变分不等式,统一和发展了文(2-6)中的相应结果。  相似文献   

20.
k-COVERS AND CERTAIN QUOTIENT IMAGES OF PARACOMPACT LOCALLY COMPACT SPACES   总被引:1,自引:0,他引:1  
We continue to discuss some properties of certain k-covers. As applications, we give some characterizations of certain quotient images of paracompact locally compact spaces.  相似文献   

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