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A counterpart of the famous Bessel's inequality for orthornormal families in real or complex inner product spaces is given. Applications for some Gruss type inequalities are also provided.

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

Some related results to Pecaric's inequality in inner product spaces that generalises Bombieri's inequality, are given.

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

A criterion is presented for the Modified Logarithmic Sobolev inequality on metric measure spaces. The criterion based on U-bound inequalities introduced by Hebisch and Zegarlinski allows to show the inequality for measures that go beyond…

Functional Analysis · Mathematics 2019-07-05 Ioannis Papageorgiou

This preprint is a text for students and teachers on inequalities. Some standard topics are covered on application of calculus to inequality proving. Many examples are considered, stated, solved or partially solved. Some problems are…

History and Overview · Mathematics 2022-09-07 Sergei Sitnik , Elina Shishkina , Lidiya Kovaleva , Olga Chernova

This note improves the best known exponent 1/12 in the prime field sum-product inequality (for small sets) to 1/11, modulo a logarithmic factor.

Combinatorics · Mathematics 2011-04-21 Misha Rudnev

In this note, we present a refinement of the well-known AM-GM inequality. We use this improved inequalty to establish corresponding inequalities on Hilbert space. We also give some refinements of the Kantorovich inequality.

Functional Analysis · Mathematics 2021-11-08 Mehdi Eghbali Amlashi , Mahmoud Hassani

We prove a simple inequality for a sum of squares of norms of two vectors in an inner product space. Next, using this inequality we derive the so--called "reverse uncertainty relation" and analyze its properties.

Quantum Physics · Physics 2026-05-28 K. Urbanowski

The Gaussian product inequality is a long-standing conjecture. In this paper, we investigate the three-dimensional inequality $E[X_1^{2}X_2^{2m_2}X_3^{2m_3}]\ge E[X_1^{2}]E[X_2^{2m_2}]E[X_3^{2m_3}]$ for any centered Gaussian random vector…

Probability · Mathematics 2022-05-11 Oliver Russell , Wei Sun

We present a single inequality as the necessary and sufficient condition for two unsharp observables of a two-level system to be jointly measurable in a single apparatus and construct explicitly the joint observables. A complementarity…

Quantum Physics · Physics 2008-09-17 Sixia Yu , Naile Liu , Li Li , C. H. Oh

We improve constants in the Rademacher-Menchov inequality.

Probability · Mathematics 2007-05-23 Witold Bednorz

Keller packings and tilings of boxes are investigated. Certain general inequality measuring a complexity of such systems is proved. A straightforward application to the unit cube tilings is given.

Combinatorics · Mathematics 2018-04-23 Krzysztof Przesławski

We prove the Levin-Ste\v{c}kin inequality using Chebyshev's inequality and symmetrization. Symmetry and slightly modified Chebyshev's inequality are also the key to an elementary proof of Clausing's inequality .

Classical Analysis and ODEs · Mathematics 2016-12-19 Alfred Witkowski

We prove an elementary yet useful inequality bounding the maximal value of certain linear programs. This leads directly to a bound on the martingale difference for arbitrarily dependent random variables, providing a generalization of some…

Functional Analysis · Mathematics 2007-05-23 Leonid Kontorovich

In this paper, we present a generalization of the Huygens types inequalities involving Bessel and modified Bessel functions of the first kind.

Classical Analysis and ODEs · Mathematics 2016-01-07 Khaled Mehrez

In this paper we obtain a generalization of some integral inequalities related to Chebyshev`s functional by using a generalized Katugampola fractional integral.

General Mathematics · Mathematics 2019-09-17 Tariq A. Al-Jaaidi , Deepak B. Pachpatte

Some extensions of an inequality from IMO'2001 are proven by means of the Lagrange multiplier criterion.

History and Overview · Mathematics 2007-05-23 Oleg Mushkarov , Nikolai Nikolov

This note introduces bilinear estimates intended as a step towards an $L^\infty$-endpoint Kato-Ponce inequality. In particular, a bilinear version of the classical Gagliardo-Nirenberg interpolation inequalities for a product of functions is…

Analysis of PDEs · Mathematics 2013-11-20 Loukas Grafakos , Diego Maldonado , Virginia Naibo

Inequalities for product operators on mixed norm Lebesgue spaces and permuted mixed norm Lebesgue spaces are established. They depend only on inequalities for the factors and on the Lebesgue indices involved. Inequalities for the bivariate…

Functional Analysis · Mathematics 2022-01-20 Wayne Grey , Gord Sinnamon

On fractals, different measures (mutually singular in general) are involved to measure volumes of sets and energies of functions. Singularity of measures brings difficulties in (especially non-linear) analysis on fractals. In this paper, we…

Classical Analysis and ODEs · Mathematics 2017-08-24 Xuan Liu , Zhongmin Qian

We provide a new characterization of the logarithmic Sobolev inequality.

Analysis of PDEs · Mathematics 2017-02-16 Hoai-Minh Nguyen , Marco Squassina