共查询到20条相似文献,搜索用时 15 毫秒
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切片与Banach空间的凸性,光滑性 总被引:14,自引:1,他引:13
本文用单位球的切片统一且简捷地处理Banach空间的(局部)K一致凸、近一致凸、近一致光滑性;定义Banach空间的(局部)K一致光滑、局部近一致凸、局部近一致光滑、近-强凸、近-强光滑性等概念,并讨论上述凸性,光滑性的关系及性能。 相似文献
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Ould Ahmed Mahmoud Sid Ahmed 《数学物理学报(B辑英文版)》2012,32(2):520-530
This article has two purposes:the first is to give some structure results for the class of m-isometries,and the second purpose is to extend the notions of left and right inverses to m-left and m-right ... 相似文献
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Liu Peide 《数学年刊B辑(英文版)》1992,13(2):167-179
The aim of this paper is establishing some inequalities of several operators on Banach-space-valued martingales and using them to give some characterizations of geometrical properties of Banach spaces. In particular, the Φ-function nequalitities of sharp operators f_p~#, f_p~#, p-variation operators W_p, W_p and the martingale tranform operator T_v are discussed. It is proved that the boundedness of these operators characterizes the smoothness, convexity and UMD-property of Banach spaces. 相似文献
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Qianglian Huang & Shuangyun Gao 《分析论及其应用》2012,28(2):146-155
Utilizing the stability characterizations of generalized inverses of linear operator, we investigate the existence of generalized resolvent of linear pencils in Banach spaces. Some practical criterions for the existence of generalized resolvents of the linear pencil λ→ T λ S are provided and an explicit expression of the generalized resolvent is also given. As applications, the characterization for the Moore-Penrose inverse of the linear pencil to be its generalized resolvent and the existence of the generalized resolvents of linear pencils of finite rank operators, Fredholm operators and semi-Fredholm operators are also considered. The results obtained in this paper extend and improve many results in this area. 相似文献
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商绍强 《数学物理学报(B辑英文版)》2021,(2):461-474
In this paper, we prove that(X, p) is separable if and only if there exists a w~*-lower semicontinuous norm sequence {pn}n=1~∞ of(X~*, p) such that(1) there exists a dense subset Gn of X~* such that pn is Gateaux differentiable on Gn and dpn(Gn) ? X for all n ∈ N;(2) pn ≤ p and pn → p uniformly on each bounded subset of X~*;(3) for anyα∈(0, 1), there exists a ball-covering {B(xi,n~*, r 相似文献
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本文研究带不等式和等式约束的多目标规划的Mond-Weir型对偶性理论。在目标和约束是广义凸的假设下,证明了弱对偶定理、直接对偶定理以及逆对偶定理 相似文献
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The present paper is devoted to determining the metric g for an n-dimension-al (n≥4) Riemannian manifold (M, g) of quasi-constant curvature [1]. By the way, we have identified the space of quasi-constant curvature with the κ-special conformally flat space of K.Yano & B.Y.Chen [8]. Based upon the results so obtained, we have completely determined the canonical metric for such a space to admit the relevant field X as geodesic field, and the geometric structure for (M, g) to be a recurrent space of quasi-constant curvature. Also we have examined the validity of our results just obtained for a 3-dimensional conformally flat space of quasi-constant cvrvature. Besides, we have deduced some global properties of a complete manifold of quasi-constant curvature, which may be useful in applications. 相似文献
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Clarkson不等式与Banach空间几何 总被引:2,自引:2,他引:0
我们证明了Banach空间X是Clarkson p型(q余型)当且仅当X是一个特殊的p一致光滑空间(q-一致凸空间(),我们还找到刻划型(余型)的一系列鞅不等式,同时,我们得到了均方函数sharp不等式。 相似文献
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《Quaestiones Mathematicae》2013,36(3-4):311-318
Abstract We obtain some results concerning the notions of hypercyclicity and supercyclicity for continuous homogeneous polynomial maps in Banach spaces. We also present a generalization of a theorem due to Beauzamy concerning the existence of orbits tending to infinity for continuous linear operators with spectral radius > 1. 相似文献
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Ye Weiyin 《数学年刊B辑(英文版)》1998,19(3):359-368
§1.Forthesystemx=-y+δx+lx2+ny2=P(x,y),y=x(1+ax-y)=Q(x,y),{(1.1)wecanfindin[1]thefolowing:ConjectureI.Assume1a<0,n>1,n+l>0,na2... 相似文献
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本文主要研究了 Banach 空间上交换算子组的张量积以及 Banach 代数的张量积中交换元组的 Taylor 联合谱,推广了 Vasilescu,F.H.及 Wrobel,V.等人结果。 相似文献
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本文利用“强极小锥”的概念,获得了Banach空间中非线性脉冲Volterra型积分方程整体解的存在性定理,改进了现有文献中的某些结果. 相似文献
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61. Introduction and PreliminariesLet C be a nonempty subset Of a Banal spare X. Then a mapping T: C -- C is saidto be a LiPSdrizian maPPing if, for ear integer n 2 1, there eallts a constant km > 0' such that Ilaal ~ chill S k.llx ~ all for all ale E C. A Lipschitzian mapping T is saidto be ~ k-LiPSdszian if km = k for all n 2 1, nonerpansive if km = 1 for alln 2 1, eleCtively. Moreover, a maPPing T: C - C is called asymptotically regularll'191if Asllgu 'z ~ chill = 0 for all 2 E… 相似文献
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关于Banach空间中的向量值的Bochner积分型的广义Jensen不等式 总被引:1,自引:0,他引:1
姚云飞 《高校应用数学学报(A辑)》1998,13(2):203-208
李泽民(1990)将R^n中的极值问题的Kuhu-Tucker条件推广到了线性拓扑空间中的向量极值问题.本文作者从另一角度,以锥为工具,把在概率论与鞅论等学科有着广泛应用的R中的著名的Jensen不等式推广到序Banach空间,导出向量值的Bochner积分型的广义Jensen不等式,从而推广了前人的工作. 相似文献
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ZhongHuaijie 《数学研究》1994,27(1):204-208
We generalize Kadec‘s and Yan Zikun‘s resuhs in [1],[2] to prove; in every infinite dimensional real Banach space Y there exist an infinite dimensional subspace X and a series ∑xn such that ∑xn has property(N) in X. but(the domain of sums of this series) S(∑xn) is not a convex set. 相似文献
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