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In this paper we obtain some new refinements and reverses of Young's operator inequality. Extensions for convex functions of operators are also provided.

泛函分析 · 数学 2015-10-07 Silvestru Sever Dragomir

This paper is mainly devoted to studying operator Jensen inequality. More precisely, a new generalization of Jensen inequality and its reverse version for convex (not necessary operator convex) functions have been proved. Several special…

泛函分析 · 数学 2019-06-10 M. Shah Hosseini , H. R. Moradi , B. Moosavi

We give a Jensen operator inequality for strongly convex functions. As a corollary, we improve operator Holder-McCarthy inequality under suitable conditions.

泛函分析 · 数学 2017-02-07 H. R. Moradi , R. Naseri

A considerable amount of literature in the theory of inequality is devoted to the study of Jensen's and Young's inequality. This article presents a number of new inequalities involving the log-convex functions and the geometrically convex…

经典分析与常微分方程 · 数学 2022-02-10 Shigeru Furuichi , Hamid Reza Moradi , Supriyo Dutta

Mercer inequality for convex functions is a variant of Jensen's inequality, with an operator version that is still valid without operator convexity. This paper is two folded. First, we present a Mercer-type inequality for operators without…

泛函分析 · 数学 2020-03-06 H. R. Moradi , S. Furuichi , M. Sababheh

Motivated by some recently established operator Jensen-type inequalities related to a usual convexity, in the present paper we derive several more accurate operator Jensen-type inequalities for certain subclasses of convex functions. More…

泛函分析 · 数学 2018-05-11 Mojtaba Bakherad , Mohsen Kian , Mario Krnic , Seyyed Alireza Ahmadi

In this work, an operator superquadratic function (in operator sense) for positive Hilbert space operators is defined. Several examples with some important properties together with some observations which are related to the operator…

泛函分析 · 数学 2019-12-17 M. W. Alomari

In this paper, we give the refinement of an extension of Jensen's inequality to affine combinations. Furthermore, we present the functional form of Jensen's inequality for continuous 3-convex functions of one variable at a point.

经典分析与常微分方程 · 数学 2016-01-25 Imran Abbas Baloch , Silvestru Sever Dragomir

We give a general formulation of Jensen's operator inequality for unital fields of positive linear mappings, and we consider different types of converse inequalities.

算子代数 · 数学 2008-08-11 Frank Hansen , Josip Pecaric , Ivan Peric

We establish what we consider to be the definitive versions of Jensen's operator inequality and Jensen's trace inequality for functions defined on an interval. This is accomplished by the introduction of genuine non-commutative convex…

算子代数 · 数学 2007-05-23 Frank Hansen , Gert K. Pedersen

Inequalities play an important role in pure and applied mathematics. In particular, Jensen's inequality, one of the most famous inequalities, plays a main role in the study of the existence and uniqueness of initial and boundary value…

经典分析与常微分方程 · 数学 2022-02-09 Yamilet Quintana , José M. Rodríguez , José M. Sigarreta Almira

In this note we prove Jensen-type inequality for certain non-convex functions. We apply our idea to prove some inequalities which were suggested at some high-level math olympiades.

历史与综述 · 数学 2013-12-04 Adilsultan Lepes

In this paper, we introduce the notion of conditional $h$-convex functions and we prove an operator version of the Jensen inequality for conditional $h$-convex functions. Using this type of functions, we give some refinements for Ky-Fan's…

泛函分析 · 数学 2022-10-11 Ismail Nikoufar , Davuod Saeedi

In this paper we deal with improvement of Jensen, Jensen-Steffensen's and Jensen's functionals related inequalities for uniformly convex, phi-convex and superquadratic functions.

泛函分析 · 数学 2025-01-03 Shoshana Abramovich

In this paper we improve results related to Normalized Jensen Functional for convex functions and Uniformly Convex Functions.

泛函分析 · 数学 2024-05-27 Shoshana Abramovich

In this paper, using some aspects of convex functions, we refine discrete Jensen's inequality via weight functions. Then, using these results, we give some applications in different abstract spaces and obtain some new interesting…

数值分析 · 数学 2007-05-23 Jamal Rooin

The primary goal of this paper is to improve the operator version of Jensen inequality. As an application, we provide an improvement for the celebrated Ando's inequality. Additionally, we give a tight bound for the operator H\"older…

泛函分析 · 数学 2021-04-27 Hamid Reza Moradi , Shigeru Furuichi , Mohammed Sababheh

In this note, some refinements of Young inequality and its reverse for positive numbers are proved and using these inequalities some operator versions and Hilbert-Schmidt norm versions for matrices of these inequalities are obtained.

泛函分析 · 数学 2016-05-10 Alemeh Sheikhhosseini , Maryam Khosravi

In this article we give some improvements and generalizations of the famous Jensen's and Jensen-Mercer inequalities for twice differentiable functions, where convexity property of the target function is not assumed in advance. They…

经典分析与常微分方程 · 数学 2020-11-24 Slavko Simic

In this paper, we show refined Young inequalities for two positive operators. Our results refine the ordering relations among the arithmetic mean, the geometric mean and the harmonic mean for two positive operators. In addition, we give two…

泛函分析 · 数学 2011-04-26 Shigeru Furuichi
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