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In this paper we first introduce the Heron and Heinz means of two convex functionals. Afterwards, some inequalities involving these functional means are investigated. The operator versions of our theoretical functional results are…

泛函分析 · 数学 2018-12-20 Mustapha Raïssouli , Shigeru Furuichi

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

For a wide range of pairs of mixed norm spaces such that one space is contained in another, we characterize all cases when contractive norm inequalities hold. In particular, this yields such results for many pairs of weighted Bergman…

复变函数 · 数学 2022-08-23 Adrián Llinares , Dragan Vukotić

In this paper we have considered a difference of Jensen's inequality for convex functions and proved some of its properties. In particular, we have obtained results for Csisz\'{a}r \cite{csi1} $f-$divergence. A result is established that…

统计理论 · 数学 2007-06-13 Inder Jeet Taneja

In this paper, we obtain some new inequalities for ({\alpha},m)-convex functions. The analysis used in the proofs is fairly elementary and based on the use of Power-mean inequality.

泛函分析 · 数学 2012-09-25 M. Emin Ozdemir , Merve Avci Ardic

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

For a (non-unit) Pisot number $\beta$, several collections of tiles are associated with $\beta$-numeration. This includes an aperiodic and a periodic one made of Rauzy fractals, a periodic one induced by the natural extension of the…

数论 · 数学 2013-10-07 Milton Minervino , Wolfgang Steiner

We propose a notion of operator monotonicity for functions of several variables, which extends the well known notion of operator monotonicity for functions of only one variable. The notion is chosen such that a fundamental relationship…

算子代数 · 数学 2007-05-23 Frank Hansen

In this paper, the authors present sharp approximations in terms of sine function and polynomials for the so-called Ramanujan constant (or the Ramanujan $R$-function) $R(a)$, by showing some monotonicity, concavity and convexity properties…

复变函数 · 数学 2018-04-23 Song-Liang Qiu , Xiao-Yan Ma , Ti-Ren Huang

We characterize real functions $f$ on an interval $(-\alpha,\alpha)$ for which the entrywise matrix function $[a_{ij}] \mapsto [f(a_{ij})]$ is positive, monotone and convex, respectively, in the positive semidefiniteness order. Fractional…

泛函分析 · 数学 2007-10-09 Fumio Hiai

This short note deals with some applications of the Beta function

综合数学 · 数学 2008-04-22 Donal F. Connon

This article employs techniques from convex analysis to present characterizations of (maximal) $n-$monotonicity, similar to the well-established characterizations of (maximal) monotonicity found in the existing literature. These…

泛函分析 · 数学 2024-11-19 M. D. Voisei

For $m,n\in \mathbb{N}$, let $0 < \alpha_i,\beta_j,\lambda_{ij} \leq 1$ be such that $\sum_{j=1}^n \lambda_{ij} = \alpha_i$, $\sum_{i=1}^m \lambda_{ij} = \beta_j$, and $\sum_{i=1}^m \alpha_i = \sum_{j=1}^n \beta_j \leq 1$. We prove that the…

经典分析与常微分方程 · 数学 2019-11-07 Frédéric Ouimet

In this paper, four parameters Wright function is considered. Certain geometric properties such as starlikeness, convexity, uniform convexity and close-to-convexity are discussed for this function. Further, certain geometric properties of…

复变函数 · 数学 2021-07-13 Sourav Das , Khaled Mehrez

Some rearrangement inequalities for symmetric norms on matrices are given as well as related results for operator convex functions.

泛函分析 · 数学 2007-05-23 Jean-Christophe Bourin

We develop a general framework to study concavity properties of weighted marginals of $\beta$-concave functions on $\mathbb{R}^n$ via local methods. As a concrete implementation of our approach, we obtain a functional version of the…

泛函分析 · 数学 2025-06-23 Dario Cordero-Erausquin , Alexandros Eskenazis

We present some generalized Jensen type operator inequalities involving sequences of self-adjoint operators. Among other things, we prove that if $f:[0,\infty) \to \mathbb{R}$ is a continuous convex function with $f(0)\leq 0$, then…

泛函分析 · 数学 2014-11-04 M. S. Moslehian , J. Micic , M. Kian

We offer an alternative and shorter proof to a result by Jan J.Ub{\o}e about monotonicity properties of a one-dimensional function that appeared in the Mathematical Intelligencer in 2015. Our proof is based on reducing the problem to…

经典分析与常微分方程 · 数学 2018-11-26 Bernd Kawohl , David Krejčiřík

The famous Nash embedding theorem was aimed for in the hope that if Riemannian manifolds could be regarded as Riemannian submanifolds, this would then yield the opportunity to use extrinsic help. However, as late as 1985 (see \cite{G}) this…

微分几何 · 数学 2013-07-09 Bang-Yen Chen

The Lebesgue property (order-continuity) of a monotone convex function on a solid vector space of measurable functions is characterized in terms of (1) the weak inf-compactness of the conjugate function on the order-continuous dual space,…

泛函分析 · 数学 2014-03-14 Keita Owari