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Some Gruss type inequalities in semi-inner product modules over C*-algebras for n-tuples of vectors are established. Also we give their natu- ral applications for the approximation of the discrete Fourier and the Melin transforms of bounded…

Operator Algebras · Mathematics 2015-06-09 A. G. Ghazanfari , S. Soleimani

Some Gr\"{u}ss type inequalities in semi-inner product modules over $C^*$-algebras and $H^*$-algebras for $n$-tuples of vectors are established. Also we give their natural applications for the approximation of the discrete Fourier and the…

Functional Analysis · Mathematics 2014-09-18 A. G. Ghazanfari , B. Ghazanfari

Let X be a Hilbert C^*-module on C^*-algebra A and p in A. We denote by Dp(A;X) the set of all continuous functions f on A, which are Frechet differentiable on a open neighborhood U of p. Then, we introduce some generalized semi-inner…

Functional Analysis · Mathematics 2019-08-16 Teimouri Azadbakht , Amir Ghasem Ghazanfari

Recently proved weighted Cauchy Scwarz inequality for Hilbert $C^*$-modules leads to many H\"older type inequalities for unitarily invariant norms on Hilbert space operators.

Functional Analysis · Mathematics 2019-07-02 Dragoljub J. Kečkić

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

Analysis of PDEs · Mathematics 2007-05-23 Sever Silvestru Dragomir

Some sharp inequalities of Gruss type for sequences of vectors in real or complex inner product spaces are obtained. Applications for Jensen's inequality for convex functions defined on such spaces are also provided.

Classical Analysis and ODEs · Mathematics 2025-10-20 Sever Silvestru Dragomir

Sharp inequalitieis of Gruss type for Stieltjes integrals with application in numerical integration are provided.

Classical Analysis and ODEs · Mathematics 2025-10-20 Sever Silvestru Dragomir

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.

Functional Analysis · Mathematics 2007-05-23 Sever Silvestru Dragomir

Assuming a unitarily invariant norm $|||\cdot|||$ is given on a two-sided ideal of bounded linear operators acting on a separable Hilbert space, it induces some unitarily invariant norms $|||\cdot|||$ on matrix algebras $\mathcal{M}_n$ for…

Functional Analysis · Mathematics 2015-11-09 Jagjit Singh Matharu , Mohammad Sal Moslehian

Some companions of Gruss inequality in inner product spaces and applications for integrals are given.

Classical Analysis and ODEs · Mathematics 2007-05-23 Sever Silvestru Dragomir

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.

Functional Analysis · Mathematics 2007-05-23 Sever Silvestru Dragomir

The H$\ddot{{\rm o}}$lder-McCarty inequalities are originally derived in the Hilbert space case and have been generalized via a convex inequality. The main purpose of this paper is to extend this convex inequality to the Hilbert…

Functional Analysis · Mathematics 2025-03-03 Kangjian Wu , Jia Li , Qingxiang Xu

Recently, many researchers devoted their attention to study the extensions of the gamma and beta functions. In the present work, we focus on investigating some approximations for a class of Gauss hypergeometric functions by exploiting…

Classical Analysis and ODEs · Mathematics 2024-05-27 Mustapha Raissouli , Mohamed Chergui

Regarding the generalizations of the Bessel inequality in Hilbert spaces which are due to Bombiari and Boas--Bellman, we obtain a version of the Bessel inequality and some generalizations of this inequality in the framework of Hilbert…

Functional Analysis · Mathematics 2012-03-22 S. S. Dragomir , M. Khosravi , M. S. Moslehian

In this paper, using a fractional integral as proposed by Katugampola we establish a generalization of integral inequalities of Gruss-type. We prove two theorems associated with these inequalities and then immediately we enunciate and prove…

Classical Analysis and ODEs · Mathematics 2017-06-21 J. Vanterler da C. Sousa , D. S. Oliveira , E. Capelas de Oliveira

We prove several versions of reverse triangle inequality in Hilbert $C^*$-modules. We show that if $e_1, ..., e_m$ are vectors in a Hilbert module ${\mathfrak X}$ over a $C^*$-algebra ${\mathfrak A}$ with unit 1 such that $<e_i,e_j>=0…

Functional Analysis · Mathematics 2012-03-22 M. Khosravi , H. Mahyar , M. S. Moslehian

We prove a covariant version of the Stinespring theorem for Hilbert C*-modules.

Operator Algebras · Mathematics 2010-09-20 Maria Joita

We show that elements of Hilbert $A$-module obtained by completion of the space of square-integrable functions on a space with measure $X$ taking values in a $C^*$-algebra $A$ cannot be viewed as $A$-valued functions on $X$ defined almost…

funct-an · Mathematics 2016-08-31 V. M. Manuilov

The main objective of this paper is to obtain generalization of some Gruss-type inequalities in case of functional bounds by using a generalized Katugampola fractional integral.

General Mathematics · Mathematics 2019-10-28 Tariq A. Aljaaidi , Deepak B. Pachpatte

Some quadratic 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.

Functional Analysis · Mathematics 2007-05-23 Sever Silvestru Dragomir
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