共查询到19条相似文献,搜索用时 31 毫秒
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可容许极拓扑全体上的不变性 总被引:7,自引:0,他引:7
本文找到了一个就可容许极拓扑全体而言的不平凡的不变性质:设X是Hausdorf局部凸空间,其对偶为X′,λ=c0或lp(1p<+∞),{xj}∈X.若对每个{tj}∈λ级数∑∞j=1tjxj依最弱的可容许极拓扑σ(X,X′)收敛,则对每个{tj}∈λ级数∑∞j=1tjxj依最强的可容许极拓扑β(X,X′)也收敛. 相似文献
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为深入探讨绝对收敛级数的性质,利用子级数收敛和绝对收敛之间的关系,得到了抽象对偶系统(E,F)中最强的Orlicz-Pettis拓扑以及产生该拓扑的最大映射集族Φ的表示. 相似文献
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给出F-弱滑脊性的定义,利用此性质,证明如果λ是一个具有F-弱滑脊性的数量空间,λ-乘数无序收敛是一个对偶不变性.如果(λ,β(λ,λ~(uβ)))是FAK-空间,则上述性质变成全程不变性. 相似文献
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Thomas[1] established a genralization of the OrliczPettis theorem as follows: Let Ω be a compact Hausdorff space and X a normed space. If a series ∑fj in C(Ω,X) is subseries convergent in the topology of pointwise convergence on Ω, then ∑fj is also subseries convergent in the topology of uniform convergence on Ω. Note that ∑fj is subseries convergent in the topology of pointwise (resp., uniform) convergence on Ω means that for every (tj)∈{0,1}N, there is an f∈C(Ω,X) such that … 相似文献
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本文讨论非线性方程组的算法的局部收敛性,给出了一个统一的收敛定理.该定理相当一般,不仅包含ABS型方程,而且对目前常用的许多方法也都适用. 相似文献
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本文证明了(1)设(X_n,■_n)为M.Talagrand意义下的mil且满足条件C~ :τ∈T,其中T为(■_n)停时全体构成的集合,则(X_n)a.s.收敛.(2)设(X_n,■_n)为渐近一致可积的适应序列,则(X_n)a.s.收敛与(X_n)为mil等价.(3)L~1极限鞅,GFT(game fairer with time)及M.Talagrand意义下的mil在函数f:R→R满足条件:①连续②当|x|→∞,f(x)=O(x)时具有稳定性. 相似文献
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本文研究了不分明集的一些级数收敛性,给出了不分明集的oX-级数收敛定义及oS-序列紧致性.证明了一个在论域上逐点收敛的模订级数,将在某种中的拓扑下,也可以是收敛的.如论域X为紧度量空间,且Ai∈F(X)∩ C(X)时,级数依距离d(A,B)=收敛. 相似文献
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可测函数序列关于弱收敛概率测度序列积分的极限定理 总被引:1,自引:0,他引:1
研究了可测函数序列关于弱收敛概率测度序列积分的极限定理及其控制收敛定理,并给出了概率测度弱收敛的若干新的等价条件. 相似文献
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本文对函数空间上的一致收敛拓扑、紧收敛拓扑及 Cauchy收敛拓扑之间的关系进行了讨论 ,给出了这三个拓扑间两两等价的充要条件 相似文献
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本文给出了函数空间上的一致收敛拓扑、紧收敛拓扑及 Cauchy收敛拓扑满足第一可数公理的条件 . 相似文献
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We prove that E is a p-fine domain whenever R
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is a p-fine domain, E R
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is p-polar, and 1 < p n. By a p-fine domain we understand an open connected set in the p-fine topology, i.e. in the coarsest topology making all p-superharmonic functions continuous. As an application of our main result, we establish a general version of minimum principle. 相似文献
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本文研究了微连续子类的性质 ,证明了 :S′( X,Y)在 *一致收敛拓扑下是 Ym X的闭集 ;若 X是 P空间 ,则 S( X,Y)在图拓扑下在 Ym X中是稠密的 相似文献
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Naihua Xiu Changyu Wang Lingchen Kong 《计算数学(英文版)》2007,25(2):221-230
In this paper, we give some convergence results on the gradient projection method with exact stepsize rule for solving the minimization problem with convex constraints. Especially, we show that if the objective function is convex and its gradient is Lipschitz continuous, then the whole sequence of iterations produced by this method with bounded exact stepsizes converges to a solution of the concerned problem. 相似文献
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Birgit Jacob Jonathan R. Partington 《Journal of Mathematical Analysis and Applications》2007,332(1):346-355
Necessary and sufficient conditions are given for finite-time admissibility of a linear system defined by a Volterra integral equation when the underlying semigroup is equivalent to a contraction semigroup, in terms of a pointwise bound on the resolvent of the infinitesimal generator. This generalizes an analogous result known to hold for the standard Cauchy problem. For infinite-time admissibility, however, it is shown by means of an example that the natural generalization of the Weiss resolvent test is no longer valid. 相似文献