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The purpose of the present work is to establish decorrelation estimates for some random discrete Schrodinger operator in dimension one. We prove that the Minami estimates are consequences of the Wegner estimates and Localization. We also…

Mathematical Physics · Physics 2013-11-26 Christopher Shirley

We prove several lower bounds for the norm of a truncated Toeplitz operator and obtain a curious relationship between the $H^2$ and $H^{\infty}$ norms of functions in model spaces.

Functional Analysis · Mathematics 2009-07-20 Stephan Ramon Garcia , William T. Ross

In this work we introduce a new measure for the dispersion of the spectral scale of a Hermitian (self-adjoint) operator acting on a separable infinite dimensional Hilbert space that we call spectral spread. Then, we obtain some…

Functional Analysis · Mathematics 2022-10-18 Pedro Massey , Demetrio Stojanoff , Sebastian Zarate

In this paper, we mainly study the hyponormality of dual Toeplitz operators on the orthogonal complement of the harmonic Bergman space. First we show that the dual Toeplitz operator with bounded symbol is hyponormal if and only if it is…

Functional Analysis · Mathematics 2021-01-28 Chongchao Wang , Xianfeng Zhao

We introduce the concept of Stieltjes integral of an operator-valued function with respect to the spectral measure associated with a normal operator. We give sufficient conditions for the existence of this integral and find bounds on its…

Spectral Theory · Mathematics 2012-01-27 Sergio Albeverio , Alexander K. Motovilov

Generalizations of Ostrowski type inequality for functions of Lipschitzian type are established. Applications in numerical integration and cumulative distribution functions are also given.

Functional Analysis · Mathematics 2007-05-25 Wen-jun Liu , Qiao-ling Xue , Jian-wei Dong

In this paper, we got some refinements of the norm inequalities related to the Heinz mean and logarithmic mean.

Classical Analysis and ODEs · Mathematics 2022-06-14 Guanghua Shi

We establish some weighted $L^2$ inequalities for Fourier extension operators in the setting of orthonormal systems. In the process we develop a direct approach to such inequalities based on generalised Wigner distributions, complementing…

Classical Analysis and ODEs · Mathematics 2025-06-12 Jonathan Bennett , Neal Bez , Susana Gutierrez , Shohei Nakamura , Itamar Oliveira

In this paper,using methods of weight functions and techniques of real analysis, we provide a multidimensional Hilbert-type integral inequality with a homogeneous kernel of degree 0 as well as a best possible constant factor related to the…

Number Theory · Mathematics 2013-08-07 Michael Th. Rassias , Bicheng Yang

We prove a sharpened version of the Strichartz inequality for radial solutions of the Schr\"odinger equation in $\mathbb{R}^2\times \mathbb{R}$. We establish an improved upper bound for functions that nearly extremize the inequality, with a…

Classical Analysis and ODEs · Mathematics 2018-07-26 Felipe Gonçalves

We generalize recent results of Fleeman and Liaw on the topic of hyponormal Toeplitz operators acting on the Bergman space of the unit disk.

Classical Analysis and ODEs · Mathematics 2021-08-11 Brian Simanek

The purpose of the present work is to establish decorrelation estimates at distinct energies for some random Schr\"odinger operator in dimension one. In particular, we establish the result for some random operators on the continuum with…

Mathematical Physics · Physics 2015-06-23 Christopher Shirley

We introduce and investigate the concept of harmonical $h$-convexity for interval-valued functions. Under this new concept, we prove some new Hermite-Hadamard type inequalities for the interval Riemann integral.

General Mathematics · Mathematics 2020-02-10 Dafang Zhao , Tianqing An , Guoju Ye , Delfim F. M. Torres

Employing the Orlicz functions we extend the Buzano's inequality which is a refinement of the Cauchy-Schwarz inequality. Also using the Orlicz functions we obtain several numerical radius inequalities for a bounded linear operator as well…

Functional Analysis · Mathematics 2024-08-26 Pintu Bhunia , Raj Kumar Nayak

In this contribution we investigate the Schr\"ordinger equation associated to the Laplacian on the sphere in the form of sharp Strichartz estimates. We will provided simple proofs for our main theorems using purely the $L^2\rightarrow L^p$…

Analysis of PDEs · Mathematics 2020-06-16 Duván Cardona , Liliana Esquivel

Let $\Delta_{k,a}$ and $\Delta_k $ be the $(k,a)$-generalized Laguerre operator and the Dunkl Laplacian operator on $\mathbb{R}^n$, respectively. The aim of this article is twofold. First, we prove a restriction theorem for the…

Functional Analysis · Mathematics 2022-08-26 Shyam Swarup Mondal , Manli Song

In this paper, we describe necessary and sufficient conditions for a binormal or complex symmetric operator to have the other property. Along the way, we find connections to the Duggal and Aluthge transforms, and give further properties of…

Functional Analysis · Mathematics 2017-05-16 Caleb Holleman , Thaddeus McClatchey , Derek Thompson

This note is devoted to optimal spectral estimates for Schr\"odinger operators on compact connected Riemannian manifolds without boundary. These estimates are based on the use of appropriate interpolation inequalities and on some recent…

Analysis of PDEs · Mathematics 2013-07-25 Jean Dolbeault , Maria J. Esteban , Ari Laptev , Michael Loss

In this article, we give a short proof of Hardy's inequality for Hermite expansions of functions in the classical Hardy spaces $H^p({\mathbb R^n})$, by using an atomic decomposition of the Hardy spaces associated with the Hermite operators.…

Classical Analysis and ODEs · Mathematics 2021-11-23 Peng Chen , Jinsen Xiao

In this short note, we obtain error estimates for Riemann sums of some singular functions.

Classical Analysis and ODEs · Mathematics 2017-03-10 Pavel Gurevich , Sergey Tikhomirov