1)Paracompact[,p?r?'k?mp?kt]仿紧
1.This paper mainly proves following : (1) Let X=∏ σ∈ X σ be ||-paracompact,X is normal weak θ-refinable iff ∏ σ∈ X σ is normal weak θ-refinable for every F∈|| <ω .主要证明了如下结果 :(1)如果是X =∏σ∈ Xσ 是 | |-仿紧空间 ,则X是正规弱θ -可加细空间当且仅当 F∈ [ ]<ω,∏σ∈FXσ 是正规弱θ -可加细空间 。
2.In this paper, two kinds of topological~* -algebra were defined, they are noncommutative versions of paracompact k_R-space and normal k_R-Space respectively.本文定义两类拓朴~*-代数,称为p~*-代数和n~*-代数,并且证明p~*-代数和n~*-代数分别是仿紧k_R-空间和正规k_R-空间的非交换类比。
3.The main result is that C〈X〉is a Cech--complet and paracompact, space if and only if X is a Cech--comlplet and para- compact space.本文利用紧子集空间上的诱导映射来研究紧子集空间的完备仿紧性。
英文短句/例句
1.Studies on the Properties of Local-strongly Paracompact Space and Base-countably Paracompact Space;局部强仿紧、基—可数仿紧空间的性质研究
2.MINIMAL LINEARLY ORDERED COMPACTIFICATION ANDκ-PARACOMPACTNESS极小线性序紧化和κ仿紧性(英文)
3.Tychonoff Products of σ-ortho Compact Space and Characterizations of Base-Countably Paracompact Space;σ-ortho紧空间的乘积和基可数仿紧空间的刻画
4.Local Paracompactness and δ-connectedness in L-topological Spaces;L-拓扑空间的局部仿紧性及δ-连通性
5.CL-Images in Paracompactly Local Cosmic Spaces;仿紧局部cosmic空间的CL-映象
6.Several Paracompactness in L-Fuzzy Topological SpaceL-Fuzzy拓扑空间中的几种仿紧性
7.κ-Paracompactness of Product of Uncountable GO-spaces不可数多个GO-空间乘积的κ-仿紧性
8.On the Tychonoff product property of hereditarily ultraparacompact space关于遗传超仿紧空间的Tychonoff乘积性质
9.A Study on S-paracompact Spaces and α-expandable Spaces;关于S-仿紧空间及α-可膨胀空间性质的研究
10.I clung with both hands till my nails ached, and I shut my eyes as if to cover up the peril.我紧紧抱着桁梁,直到最后指甲发痛。 我紧闭双眼,仿佛要避开这灾难。
11.To fill(a hole)tightly with or as if with a plug;stop up.用塞塞紧,栓紧用或仿佛是用一个塞子来填紧(一个孔洞);堵上
12.The Dynamics Emulate for the Brake Application Process of the Cable Car for Passenger Transportation;客运缆车断缆锁紧过程的动力学仿真
13.Study on Dynamic Modeling and Simulation of Tensioner System;船用张紧器系统动态建模与仿真研究
14.Modeling and Simulation Analysis of 120 Emergency Valve Using AMESim基于AMESim的120紧急阀的建模及仿真分析
15.Simulation research on the technology of the tightly-coupled GPS/INS integration紧耦合GPS/INS组合导航技术仿真研究
16.The bus was like a sardine can.The people were packed in so tightly that their bodies were flattened out.这车厢仿佛沙丁鱼罐,里面的人紧紧的挤得身体都扁了。
17.She had a queer feeling that the room was closing in on her.她有一种奇特的感觉,仿佛那房间从四面八方把她紧紧围住了。
18.She pressed herself against him and wound her limbs round him, as though to reassure him with the warmth of her body.她紧紧挨着他,双臂双腿搂住他,仿佛要用她的体温抚慰他宽心。
相关短句/例句
Strongly mesocompactress强紧式仿紧
3)paracompact set仿紧集
1.A new class of abstractly generalized bi-quasi-variational inequality on paracompact sets;仿紧集上新型抽象广义双拟变分不等式
2.A new class of generalized bi-quasi-variational inequalities on paracompact sets;仿紧集上的一类新型广义双拟变分不等式
3.thispaper studied quasi-like-variational inequalities on paracompact sets, unified and extended corresponding results in [2-6本文借助于[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[2-6]中的相应结果。
4)λ-paracompactλ-仿紧
1.This paper proves the following results:Let X=(?){X_σ,π_ρ~σΛ},|A|=λ,and every projectionπ_σ:X→X_σbe an open and onto mapping,(A)If X isλ-paracompact and every X_σis normal strong screenable, then X is normal strong screenable;(B)If X is hereditarilyλ-paracompact and every X_σis hereditarily normal strong screenable,then X is hereditarily normal strong screenable.证明了如下结果:设X=(?){X_σ,π_ρ~σ,Λ},|Λ|=λ,并且每个投射π_σ:X→X_σ是开满的,(A)若X是λ-仿紧的并且每个X_σ是正规强可遮空间,则X是正规强可遮空间;(B)若X是遗传λ-仿紧的并且每个X_σ是遗传正规且遗传强可遮空间,则X是遗传正规强可遮空间。
2.Suppose each projection πα:X→Xα is an open and onto map and X is λ-paracompact.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。
5)Paracompactness仿紧性
1.A Note on Paracompactness in k-Spaces;K—空间仿紧性的一个注记
2.On Paracompactness in Fréchet Spaces;关于Fréchet空间的仿紧性
3.Yajima proved one sufficient and necessary condition about paracompactness of subspaces in Product of two ordinals.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。
6)Para-nearly compact仿近似紧
延伸阅读
仿紧空间仿紧空间paracompact space 【补注】上述Stone定理属于A .H .Stone(不是M明11司1 Stone). 保守族亦称保持闭包(C10s眠p献r劝119)的族;星形加细亦称重心加细(bary比ntrlc refinements). 仿紧概念多种多样.为了叙述这些概念,需要某些覆盖概念.一个集族称为不相交的(构。int),如果它的元素互不相交.互不相交覆盖的可数并称为叮不相交覆盖(。一明。诚coVenl唱).空间X的点有限覆盖y是指每个xcX均含于下的至多有限多个元素中.点有限覆盖的可数并称为。点有限覆盖.覆盖下称为星形有限的(star一j丽抚)(星形可数的)(star-coun七lble)),如果7的每个元素均至多与有限多个(可数多个)其他元素相交. 一个空间称为强仿紧的(strong】y pan泣以〕m印ct),如果其每个开覆盖均有星形有限的开加细;一个空间称为弱仿紧的〔a亚紧的)(weakly paracomPact(‘一优-taconlpact)),如果其每个开覆盖均有点有限(口点有限)的开加细.屏蔽(s掀ned)空问是指每个开覆盖均有a互不相交的开加细.遗传仿紧(he代xljt创yp田笼泣comPa以)空间是指每个子空间也是仿紧空间.空间称为星形正规(star一non刀al)空问或星形仿紧(star-p~olllPact)空间,如果每个开覆盖均有开的星形加细.可数仿紧(countablyp~。mpact)空间是指每个开覆盖均有局部紧的开加细.空间称为T仿紧(卜pardcolnPact)空间,T是一个基数,如果基数(T的每个开覆盖均有局部紧的开加细.至于更多的详情、这些概念彼此的关系以及其他的拓扑性质见【2].仿紧性本身仍然是核心概念. 如上所述.仿紧性是一个非常自然而有用的性质.然而,很遗憾,这个性质井不由子空间及乘积所继承.不过,就另一种涉及邻近及收敛思想的概念(不是拓扑空间),即所谓近性空间(nearlless sPaCes)而言,这个缺陷就不存在了,见工Al]及拓扑结构(toP’)logical、t~)至于“在亡ech意义下完全”的概念见完全空间(comPlete sPace).仿紧空间〔,.门”钾ct明ce;n叩姗M。呱uoe up。