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Recent reverses for the discrete generalised triangle inequality and its continuous version for vector-valued integrals in Banach spaces are surveyed. New results are also obtained. Particular instances of interest in Hilbert spaces and for…

经典分析与常微分方程 · 数学 2009-09-29 Sever Silvestru Dragomir

The Cauchy-Schwarz, Buzano and Kre\u{\i}n inequalities are three inequalities about inner product. The main goal of this article is to present refinements of Buzano and Cauchy-Schwarz inequalities, and to present a new proof of a refined…

泛函分析 · 数学 2022-06-20 Mohammad Sababheh , Hamid Reza Moradi , Zahra Heydarbeygi

This article is a follow-up to arXiv:2304.04373. We establish necessary and sufficient conditions for weighted Orlicz-Poincar\'e inequalities in product spaces. These results follow the work of Chua and Wheeden, who established similar…

泛函分析 · 数学 2025-05-22 Lucas Yong

Some sharp Bessel type inequalities for non-orthonormal families of vectors in inner product spaces are given. Applications for complex numbers are also provided.

泛函分析 · 数学 2007-05-23 Sever Silvestru Dragomir

In this paper, we study Bohr's inequality and refined versions of Bohr-Rogosinski inequalities involving Schwarz functions. Moreover, we establish a version of multidimensional analogue of Bohr inequality and Bohr-Rogosinski inequalities…

复变函数 · 数学 2023-12-12 Sabir Ahammed , Molla Basir Ahamed

A new refinement of the triangle inequality is presented in normed linear spaces. Moreover, a simple characterization of inner product spaces is obtained by using the skew-angular distance.

泛函分析 · 数学 2013-01-08 Hossein Dehghan

In this note we establish a Schwarz type inequality for holomorphic mappings between unit balls $B_n$ and $B_m$ in corresponding complex spaces.

复变函数 · 数学 2015-04-28 David Kalaj

This paper introduces a unified framework for Bohr-type inequalities by incorporating multiple Schwarz functions into the majorant series for $K$-quasiconformal harmonic mappings in the unit disk $\mathbb{D} := \{z\in\mathbb{C} : |z| <…

复变函数 · 数学 2025-10-02 Raju Biswas , Rajib Mandal

We explore and generalize a Cauchy-Schwarz-type inequality originally proved in [Electronic Journal of Linear Algebra 35, 156-180 (2019)]: $\|\mathbf{v}^2\|\|\mathbf{w}^2\| - \langle\mathbf{v}^2,\mathbf{w}^2\rangle \leq…

泛函分析 · 数学 2025-07-15 Nathaniel Johnston , Sarah Plosker , Charles Torrance , Luis M. B. Varona

In this paper, we establish five new sharp versions of Bohr-type inequalities for bounded analytic functions in the unit disk by allowing Schwarz function in place of the initial coefficients in the power series representations of the…

复变函数 · 数学 2020-09-14 Yong Huang , Ming-Sheng Liu , Saminathan Ponnusamy

In contrast with classical Schwarz theory, recent results in computational chemistry have shown that for special domain geometries, the one-level parallel Schwarz method can be scalable. This property is not true in general, and the issue…

数值分析 · 数学 2019-12-24 Gabriele Ciaramella , Muhammad Hassan , Benjamin Stamm

The primary objective of this paper is to establish several sharp versions of Bohr inequalities for bounded analytic functions in the unit disk $\mathbb{D} := \{z\in\mathbb{C} : |z| < 1\}$ involving multiple Schwarz functions. Moreover, we…

复变函数 · 数学 2026-04-14 Vasudevarao Allu , Raju Biswas , Rajib Mandal

We prove a set of inequalities that interpolate the Cauchy-Schwarz inequality and the triangle inequality. Every nondecreasing, convex function with a concave derivative induces such an inequality. They hold in any metric space that…

度量几何 · 数学 2025-01-06 Christof Schötz

A generalization of the H\"older inequality is considered. Its relations with a previously obtained improvement of the Cauchy--Schwarz inequality are discussed.

经典分析与常微分方程 · 数学 2017-01-17 Iosif Pinelis

We study a family of inequalities on pairs of measure spaces involving functions defined on product domains. Our main result establishes a Jensen-type inequality under a general product-measure framework, extending classical inequalities…

泛函分析 · 数学 2026-03-09 P. D. Johnson , R. N. Mohapatra , Shankhadeep Mondal

We study the uncertainty relation in the product form of variances and obtain some new uncertainty relations with weight, which are shown to be tighter than those derived from the Cauchy Schwarz inequality.

量子物理 · 物理学 2020-09-08 Xiaofen Huang , Tinggui Zhang , Naihuan Jing

In this paper we first take a detail survey of the study of the Banach-Saks property of Banach spaces and then show the Banach-Saks property of the product spaces generated by a finite number of Banach spaces having the Banach-Saks…

泛函分析 · 数学 2007-05-23 Zhenglu Jiang , Xiaoyong Fu

We study the reverse triangle inequalities for suprema of logarithmic potentials on compact sets of the plane. This research is motivated by the inequalities for products of supremum norms of polynomials. We find sharp additive constants in…

复变函数 · 数学 2013-07-23 I. E. Pritsker , E. B. Saff

Quantum inequalities are lower bounds for local averages of quantum observables that have positive classical counterparts, such as the energy density or the Wick square. We establish such inequalities in general (possibly interacting)…

数学物理 · 物理学 2009-10-29 Henning Bostelmann , Christopher J. Fewster

We present a mechanical proof of the Cauchy-Schwarz inequality in ACL2(r) and a formalisation of the necessary mathematics to undertake such a proof. This includes the formalisation of $\mathbb{R}^n$ as an inner product space. We also…

计算机科学中的逻辑 · 计算机科学 2018-10-11 Carl Kwan , Mark R. Greenstreet