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The purpose of this survey is to give a comprehensive introduction to some classes of classical and recent analytic inequalities in Inner Product Spaces.

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

In this work, the mixed Schwarz inequality for semi-Hilbertian space operators is proved. Namely, for every positive Hilbert space operator $A$. If $f$ and $g$ are nonnegative continuous functions on $\left[0,\infty\right)$ satisfying…

泛函分析 · 数学 2020-07-06 Mohammad W. Alomari

Some reverses of the continuous triangle inequality for Bochner integral of vector-valued functions in Hilbert spaces are given. Applications for complex-valued functions are provided as well.

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

Some inequalities in 2-inner product spaces generalizing Bessel's result that are similar to the Boas-Bellman inequality from inner product spaces, are given. Applications for determinantal integral inequalities are also provided.

泛函分析 · 数学 2007-05-23 S. S. Dragomir , Y. J. Cho , S. S. Kim , A. Sofo

We consider generalized inverses of linear operators on arbitrary vector spaces and study the question when their product in reverse order is again a generalized inverse. This problem is equivalent to the question when the product of two…

泛函分析 · 数学 2013-08-14 Anja Korporal , Georg Regensburger

Various results are proved giving lower bounds for the $m$th intrinsic volume $V_m(K)$, $m=1,\dots,n-1$, of a compact convex set $K$ in ${\mathbb{R}}^n$, in terms of the $m$th intrinsic volumes of its projections on the coordinate…

度量几何 · 数学 2013-12-10 Stefano Campi , Richard J. Gardner , Paolo Gronchi

In this paper, we obtain a reverse version of the integral Hardy inequality on metric measure space with two negative exponents. Also, as for applications we show the reverse Hardy-Littlewood-Sobolev and the Stein-Weiss inequalities with…

偏微分方程分析 · 数学 2022-11-28 Aidyn Kassymov , Michael Ruzhansky , Durvudkhan Suragan

Some reverses of the continuous triangle inequality for Bochner integral of vector-valued functions in complex Hilbert spaces are given. Applications for complex-valued functions are provided as well.

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

Some new Gruss type inequalities in inner product spaces and applications for integrals are given.

偏微分方程分析 · 数学 2007-05-23 Sever Silvestru Dragomir

Motivated by the problem of filtering candidate pairs in inner product similarity joins we study the following inner product estimation problem: Given parameters $d\in {\bf N}$, $\alpha>\beta\geq 0$ and unit vectors $x,y\in {\bf R}^{d}$…

数据结构与算法 · 计算机科学 2020-01-14 Rasmus Pagh , Johan Sivertsen

New results related to the Bombieri generalisation of Bessel's inequality in inner product spaces are given.

经典分析与常微分方程 · 数学 2007-05-23 Sever Silvestru Dragomir

Some sharp discrete inequalities in normed linear spaces are obtained. New reverses of the generalised triangle inequality are also given.

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

We give an extension to certain \textit{RD-space} $\X$, i.e space of homogeneous type in the sense of Coifman and Weiss, which has the reverse doubling property, of the definition and various properties of the product of functions in…

经典分析与常微分方程 · 数学 2009-02-19 Justin Feuto

A generalisation of inner product spaces of an inequality due to Ostrowski and applications for sequences and integrals are given.

经典分析与常微分方程 · 数学 2007-05-23 Sever S. Dragomir , Anca C. Gosa

We present some identities related to the Cauchy-Schwarz inequality in complex inner product spaces. A new proof of the basic result on the subject of Strengthened Cauchy-Schwarz inequalities is derived using these identities. Also, an…

数值分析 · 数学 2013-02-12 J. M. Aldaz

Some new bounds for the Chebychev functional of a pair of vectors in inner product spaces are pointed out. Reverses for the celebrated Jensen's inequality for convex functions defined on inner product spaces are given as well.

经典分析与常微分方程 · 数学 2007-05-23 Sever Silvestru Dragomir

A new counterpart of Bessel's inequality for orthornormal families in real or complex inner product spaces is obtained. Applications for some Gruss type results are also provided.

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

The Pinsker inequality lower bounds the Kullback--Leibler divergence $D_{\textrm{KL}}$ in terms of total variation and provides a canonical way to convert $D_{\textrm{KL}}$ control into $\lVert \cdot \rVert_1$-control. Motivated by…

信息论 · 计算机科学 2026-02-06 Guglielmo Beretta , Tommaso Cesari , Roberto Colomboni

The Alexandrov--Fenchel inequality bounds from below the square of the mixed volume $V(K_1,K_2,K_3,\ldots,K_n)$ of convex bodies $K_1,\ldots,K_n$ in $\mathbb{R}^n$ by the product of the mixed volumes $V(K_1,K_1,K_3,\ldots,K_n)$ and…

度量几何 · 数学 2021-06-25 Károly J. Böröczky , Daniel Hug

This is the first in our series of papers concerning some Hardy-Littlewood-Sobolev type inequalities. In the present paper, the main objective is to establish the following sharp reversed HLS inequality in the whole space $\mathbb R^n$…

偏微分方程分析 · 数学 2018-08-31 Quôc-Anh Ngô , Van Hoang Nguyen