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Some improvements of the celebrated Schwarz inequality in complex inner product spaces are given. Applications for n-tuples of complex numbers are provided.

泛函分析 · 数学 2017-09-08 Silvestru Sever Dragomir

We find best constants in several dilation invariant integral inequalities involving derivatives of functions. Some of these inequalities are new and some were known without best constants. The contents: 1. Estimate for a quadratic form of…

偏微分方程分析 · 数学 2008-03-10 V. Maz'ya , T. Shaposhnikova

We derive sharp Adams inequalities for the Riesz and other potentials of functions with arbitrary compact support in R^n. Up to now such results were only known for a class of functions whose supports have uniformly bounded measure. We…

偏微分方程分析 · 数学 2015-07-17 Luigi Fontana , Carlo Morpurgo

In this article, we present some new general forms of numerical radius inequalities for Hilbert space operators. The significance of these inequalities follow from the way they extend and refine some known results in this field. Among other…

泛函分析 · 数学 2019-06-21 Mohammad Sababheh , Hamid Reza Moradi

We highlight overlap as one of the simplest inequalities in linear space that yields a number of useful results. One obtains the Cauchy-Schwarz inequality as a special case. More importantly, a variant of it is seen to work desirably in…

量子物理 · 物理学 2019-08-06 Kamal Bhattacharyya

In this article we studied the relationship between metric spaces and multiplicative metric spaces. Also, we pointed out some fixed and common fixed point results under some contractive conditions in multiplicative metric spaces can be…

一般拓扑 · 数学 2015-12-14 K. Abodayeh , A. Pitea , W. Shatanawi , T. Abdeljawad

This paper deals with the solution of large classes of systems of nonlinear partial differential equations (PDEs) in spaces of generalized functions that are constructed as the completion of uniform convergence spaces. The existence result…

偏微分方程分析 · 数学 2009-02-18 Jan Harm van der Walt

We present a general refinement of the Cauchy-Schwarz inequality over complete inner product spaces and show that it can be of interest for some statistical applications. This generalizes and simplifies previous results on the same subject.

统计理论 · 数学 2024-04-10 Sergio Scarlatti

In the recent work [Metrically round and sleek metric spaces, \emph{The Journal of Analysis} (2022), pp 1--17], the authors proved some results on metrically round and sleek linear metric spaces and metric spaces. In continuation, the…

度量几何 · 数学 2022-09-08 Jitender Singh , T. D. Narang

I give a short review of the theory of twisted symmetries of differential equations, emphasizing geometrical aspects. Some open problems are also mentioned.

数学物理 · 物理学 2018-05-29 Giuseppe Gaeta

In this paper, some new Gronwall type inequalities involving iterated integrals are given.

经典分析与常微分方程 · 数学 2007-05-23 Y. J. Cho , S. S. Dragomir , Y. -H. Kim

In this paper, we study the further improvements of the reverse Young and Heinz inequalities for the wider range of $v$, namely $v\in \mathbb{R}$. These modified inequalities are used to establish corresponding operator inequalities on a…

经典分析与常微分方程 · 数学 2018-02-01 Shigeru Furuichi , Mohammad Bagher Ghaemi , Nahid Gharakhanlu

In this paper, we introduce the notion of partially ordered {\epsilon}-chainable metric spaces and we derive new coupled fixed point theorems for uniformly locally contractive mappings on such spaces.

一般拓扑 · 数学 2010-05-19 Bessem Samet , Habib Yazidi

In this paper, we consider a new weak norm, iterated weak norm in Lebesgue spaces with mixed norms. We study properties of the mixed weak norm and the iterated weak norm and present the relationship between the two weak norms. Even for the…

泛函分析 · 数学 2018-04-02 Ting Chen , Wenchang Sun

We give some results on quadratic normality of reducible curves canonically embedded and partially extend this study to their projective normality.

代数几何 · 数学 2010-09-27 Edoardo Ballico , Silvia Brannetti

In this paper we investigate some dichotomy concepts for linear difference equations in Banach spaces. We motivate our approach by illustrative examples.

动力系统 · 数学 2011-08-26 Ioan-Lucian Popa , Mihail Megan , Traian Ceausu

We establish new integral inequalities for the numerical radius and the operator norm of bounded linear operators on Hilbert spaces. Our results refine classical triangle-type and operator matrix inequalities by incorporating convex…

泛函分析 · 数学 2026-02-17 Shiva Sheybani , Hamid Reza Moradi , Mohammad Sababheh

In this paper, we give sharp Rusak- and Markov-type inequalities for rational functions on several intervals when the system of intervals is a \textquotedblleft rational function inverse image\textquotedblright\, of an interval and those…

复变函数 · 数学 2015-06-23 M. A. Akturk , A. Lukashov

We characterize the finite dimensional asymmetric normed spaces which are right bounded and the relation of this property with the natural compactness properties of the unit ball, as compactness and strong compactness. In contrast with some…

一般拓扑 · 数学 2017-02-15 Natalia Jonard-Pérez , Enrique A. Sánchez-Pérez

In this paper I survey some recent results on finite determination, convergence, and approximation of formal mappings between real submanifolds in complex spaces. A number of conjectures are also given.

复变函数 · 数学 2007-05-23 Linda Preiss Rothschild