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The linearizability of differential equations was first considered by Lie for scalar second order semi-linear ordinary differential equations. Since then there has been considerable work done on the algebraic classification of linearizable…

Classical Analysis and ODEs · Mathematics 2008-04-25 Asghar Qadir

In this paper, we give the explicit formulas for the Neuman means $N_{AH}$, $N_{HA}$, $N_{AC}$ and $N_{CA}$, and present the best possible upper and lower bounds for theses means in terms of the combinations of harmonic mean $H$, arithmetic…

Classical Analysis and ODEs · Mathematics 2014-05-20 Zai-Yin He , Yu-Ming Chu , Ying-Qing Song , Xiao-Jing Tao

We provide a new characterization of the logarithmic Sobolev inequality.

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

Some inequalities for functions of bounded variation that provide reverses for the inequality between the integral mean and the p-norm are established. Applications related to the celebrated Landau inequality between the norms of the…

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

In this note, we find a new inequality involving primes and deduce several Bonse-type inequalities.

General Mathematics · Mathematics 2009-08-21 Shaohua Zhang

We show that any weighted geometric mean of Chebyshev polynomials is bounded from above by another Chebyshev polynomial. We also study a related homogeneous cyclic inequality $$ \left (\sum_{i=1}^n x_i^{(a+b+1)/2} \right )^2 \geq…

Classical Analysis and ODEs · Mathematics 2023-01-03 Mohammad Javaheri , Harry Shen

We construct measure which determines a two-variable mean in a very natural way. Using that measure we can extend the mean to infinite sets as well. E.g. we can calculate the geometric mean of any set with positive Lebesgue measure. We also…

Classical Analysis and ODEs · Mathematics 2023-12-06 Attila Losonczi

We give a~new proof of the known criteria for the inequality \begin{equation*} \left(\int_{0}^{\infty}\left(\int_{0}^{t}f\right)^{q}w(t)\,dt\right)^{\frac{1}{q}} \leq C \left(\int_{0}^{\infty}f^{p}v\right)^{\frac{1}{p}}. \end{equation*} The…

Classical Analysis and ODEs · Mathematics 2021-10-01 Amiran Gogatishvili , Luboš Pick

We develop a new proof of the result of L.-E.~Persson and V.D.~Stepanov \cite[Theorems 1 and 3]{Per:02}, which provides a characterization of a Hardy integral inequality involving two weights, and which can be applied to an effective…

Functional Analysis · Mathematics 2025-07-02 Amiran Gogatishvili , Luboš Pick , Hana Turčinová , Tuğçe Ünver

Consider the following noncommutative arithmetic-geometric mean inequality: given positive-semidefinite matrices $\mathbf{A}_1, \dots, \mathbf{A}_n$, the following holds for each integer $m \leq n$: $$ \frac{1}{n^m}\sum_{j_1, j_2, \dots,…

Spectral Theory · Mathematics 2015-06-22 Arie Israel , Felix Krahmer , Rachel Ward

In this note, we present new properties for a sequence arising in some refinements of Carleman's inequality. Our results extend some results of Yang [Approximations for constant e and their applications J. Math. Anal. Appl. 262 (2001)…

Classical Analysis and ODEs · Mathematics 2014-01-13 Yue Hu , Cristinel Mortici

The many-normal-means problem is a classic example that motivates the development of many important inferential procedures in the history of statistics. In this short note, we consider a further special case of the problem, which involves…

Methodology · Statistics 2025-08-19 Yang Liu , Jonathan P. Williams

In the line of previous work by Naor, we establish new forms of metric $\mathrm{X}_p$ inequalities in group algebras under very general assumptions. Our results' applicability goes beyond the previously known setting in two directions. In…

Functional Analysis · Mathematics 2022-09-14 Antonio Ismael Cano-Mármol , José M. Conde-Alonso , Javier Parcet

For $n$ positive numbers ($a_k$, $1\leq k \leq n$), enhanced inequalities about the arithmetic mean ($A_n \equiv \frac{\sum_ka_k}{n}$) and the geometric mean ($G_n\equiv \sqrt[n]{\Pi_ka_k}$) are found if some numbers are known, namely,…

General Mathematics · Mathematics 2020-08-11 Fang Dai , Li-Gang Xia

We consider in this paper two different types of the weighted geometric means of positive definite operators. We show the component-wise bijection of these geometric means and give a geometric property of the spectral geometric mean as a…

Functional Analysis · Mathematics 2020-09-23 Sejong Kim

Using double counting, we prove Delsarte inequalities for $q$-ary codes and their improvements. Applying the same technique to $q$-ary constant-weight codes, we obtain new inequalities for $q$-ary constant-weight codes.

Combinatorics · Mathematics 2013-01-01 Hyun Kwang Kim , Phan Thanh Toan

In this paper, by using Jensen's inequality and Chebyshev integral inequality, some generalizations and new refined Hardy type integral inequalities are obtained. In addition, the corresponding reverse relation are also proved.

Classical Analysis and ODEs · Mathematics 2015-12-02 Khaled Mehrez

Certain new inequalities for the sums of factorials are presented.

General Mathematics · Mathematics 2008-06-03 Mihaly Bencze , Florentin Smarandache

We discuss the inequalities for $q$-integrals because of the fact that the inequalities can be very useful in the future mathematical research. Since $q$-integral of a function over an interval $[a,b]$ is defined by the difference of two…

Classical Analysis and ODEs · Mathematics 2007-05-23 Predrag M. Rajkovic , Sladjana D. Marinkovic , Miomir S. Stankovic

In this note we give several characterisations of weights for two-weight Hardy inequalities to hold on general metric measure spaces possessing polar decompositions. Since there may be no differentiable structure on such spaces, the…

Functional Analysis · Mathematics 2019-12-24 Michael Ruzhansky , Daulti Verma
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