共查询到19条相似文献,搜索用时 105 毫秒
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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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正则F集空间中的度量拓扑 总被引:1,自引:1,他引:0
本文证明了R^n上正则F集收敛拓扑空间是完备的、可分的度量空间,给出了该种度量的具体表达形式。本文还讨论了弱收敛度量拓扑与正则F集上另外两种度量拓扑-一致收敛拓扑及积分收敛拓扑-之间的关系。 相似文献
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本文在给出拓扑空间子集网交的拓扑收敛条件基础上,利用子集网的仅同性进一步讨论了拓扑空间子集网交的收敛性,并深入讨论子集网交对紧致Hausdorff空间的Vietoris超拓扑空间的收敛性。 相似文献
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模糊拓扑空间的m—收敛理论 总被引:3,自引:0,他引:3
本文在模糊拓扑空间中引进了模糊网和模糊滤子的m-收敛概念,探讨了模糊网的m-收敛与模糊滤子的m-收敛之间的关系,得到了Hausdorff拓扑与模糊网的m-收敛和模糊滤子的m-收敛之间的关系以及刻画Hausdorff拓扑几何特征的定理。 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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本文给出L-fuzzy N-收敛空间的定义,讨论L-fuzzy N-收敛空间范畴(L-fuzzyN-收敛空间和它们之间的连续映射构成的范畴)的若干范畴的性质,并且证明它的一个子范畴同构与L-fuzzy拓扑空间范畴. 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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Convergence in probability for Toeplitz weighted sums is obtained for convex tight random elements in D[0, 1] under pointwise conditions. The almost sure convergence of the weighted sums is proved for independent, convex tight random elements and for independent, identically distributed random elements. Special techniques and concepts are developed in order to obtain these results in the Skorohod topology of D[0, 1]. 相似文献
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In this paper we will prove that, for an arbitrary metric space X and a fairly arbitrary collection Σ of subsets of X, it is possible to endow the hyperspace CL(X) of all nonempty closed subsets of X (to be identified with their distance functionals) with a canonical distance function having the topology of uniform convergence on members of Σ as topological coreflection and the Hausdorff metric as metric coreflection. For particular choices of Σ, we obtain canonical distance functions overlying the Wijsman and Attouch-Wets topologies. Consequently we apply the general theory of spaces endowed with a distance function and compare the results with those obtained for the classical hyperspace topologies. In all cases we are able to prove results which are both stronger and more general than the classical ones. 相似文献
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We study some properties of the weak convergence of filtrations, in particular, its behavior under elementary set operations.
We also derive relations between the convergence of filtrations generated by point processes with a single jump and the convergence
of their compensators or distributions of their jump moments. Finally, we apply a lemma on the intersection of σ-algebras
to filtrations generated by different discretizations of a single process.
Translated from Lietuvos Matematikos Rinkinys, Vol. 40, No. 3, pp. 295–306, July–September, 2000.
Translated by V. Mackevičius 相似文献
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Stability of Doob—Meyer Decomposition Under Extended Convergence 总被引:1,自引:0,他引:1
JeanMemin 《应用数学学报(英文版)》2003,19(2):177-190
In what follows, we consider the relation between Aldous‘s extended convergence and weak convergence of filtrations. We prove that, for a sequence (X^n) of Ft^n )-special semimartingales, with canonical decomposition X^n =M^n A^n, if the extended convergence (X^n,F.^n)→(X,T. ) holds with a quasi-left continuous (Ft)-special semimartingale X = M A, then, under an additional assumption of uniform integrability,we get the convergence in probability under the Skorokhod topology: M^n↑P→M and A^n↑P→ A. 相似文献
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The aim of this paper is to continue Naimpally’s seminal papers [16], [17], [18], i.e. we investigate topological properties
of spaces which force the coincidence of convergences of functions associated with different hyperspace topologies. For example
a metric spaceX is locally compact iff the topological convergence and the convergence induced by the Fell topology coincide onC(X,IR). Moreover, the proximal topology on the space of functions, not necessarily continuous, is studied in great detail. 相似文献
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We discuss estimates for the rate of convergence of the method of successive subspace corrections in terms of condition number estimate for the method of parallel subspace corrections. We provide upper bounds and in a special case, a lower bound for preconditioners defined via the method of successive subspace corrections. 相似文献