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In this note, we derive non trivial sharp bounds related to the weighted harmonic-geometric-arithmetic means inequalities, when two out of the three terms are known. As application, we give an explicit bound for the trace of the inverse of…

Classical Analysis and ODEs · Mathematics 2010-09-27 Gerard Maze , Urs Wagner

In the current note, we investigate the mathematical relations among the weighted arithmetic mean-geometric mean (AM-GM) inequality, the H\"{o}lder inequality and the weighted power-mean inequality. Meanwhile, the proofs of mathematical…

Functional Analysis · Mathematics 2021-03-16 Yongtao Li , Xian-Ming Gu , Jianxing Zhao

We give some new refinements and reverses Young inequalities in both additive-type and multiplicative-type for two positive numbers/operators. We show our advantages by comparing with known results. A few applications are also given. Some…

Functional Analysis · Mathematics 2018-03-26 Shigeru Furuichi , Hamid Reza Moradi

In the article, some Huygens and Wilker type inequalities involving trigonometric and hyperbolic functions are refined and sharpened.

Classical Analysis and ODEs · Mathematics 2014-09-05 Wei-Dong Jiang , Qiu-Ming Luo , Feng Qi

In this paper, we show that the $\nu$-weighted arithmetic mean is greater than the product of the $\nu$-weighted geometric mean and Specht's ratio. As a corollary, we also show that the $\nu$-weighted geometric mean is greater than the…

Functional Analysis · Mathematics 2011-03-10 Shigeru Furuichi

We study the perimeter inequality under circular symmetrisation, and we provide a full geometric characterisation of equality cases. A careful inspection of the proof shows that a similar characterisation holds true also for the perimeter…

Analysis of PDEs · Mathematics 2023-11-30 Matteo Perugini

The arithmetic mean/geometric mean-inequality (AM/GM-inequality) facilitates classes of non-negativity certificates and of relaxation techniques for polynomials and, more generally, for exponential sums. Here, we present a first systematic…

Optimization and Control · Mathematics 2021-12-09 Philippe Moustrou , Helen Naumann , Cordian Riener , Thorsten Theobald , Hugues Verdure

In this paper, we sharpen and generalize Shafer's inequality for the arc tangent function. From this, some known results are refined.

Classical Analysis and ODEs · Mathematics 2010-07-12 Feng Qi , Bai-Ni Guo

A generalization of the affine-geometric Wirtinger inequality for curves to hypersurfaces is given.

Differential Geometry · Mathematics 2012-09-28 Mohammad N. Ivaki

The concept of geometric-arithmetic index was introduced in the chemical graph theory recently, but it has shown to be useful. The aim of this paper is to obtain new inequalities involving the geometric-arithmetic index $GA_1$ and…

Combinatorics · Mathematics 2020-04-07 Domingo Pestana , Jose María Sigarreta , Eva Tourís

In the paper, we present a monotonicity result of a function involving the gamma function and the logarithmic function, refine a double inequality for the gamma function, and improve some known results for bounding the gamma function.

Classical Analysis and ODEs · Mathematics 2012-05-21 Feng Qi , Bai-Ni Guo

We present a formalization of geometric instruments that considers separately geometric and arithmetic aspects of them. We introduce the concept of tool, which formalizes a physical instrument as a set of axioms representing its geometric…

Number Theory · Mathematics 2014-09-26 Jordi Guàrdia , Eulàlia Tramuns

The aim of this paper is to present some new Fejer-type results for convex functions. Improvements of Young's inequality (the arithmetic-geometric mean inequality) and other applications to special means are pointed as well.

Classical Analysis and ODEs · Mathematics 2012-03-22 N. Minculete , F. -C. Mitroi

We consider some integral-geometric quantities that have recently arisen in harmonic analysis and elsewhere, derive some sharp geometric inequalities relating them, and place them in a wider context.

Functional Analysis · Mathematics 2024-04-09 Silouanos Brazitikos , Anthony Carbery , Finlay McIntyre

The present paper is devoted to the study of Jensen-Mercer-type inequalities. Our results generalize and improve some earlier results in the literature.

Classical Analysis and ODEs · Mathematics 2019-05-07 Hamid Reza Moradi , Shigeru Furuichi

Eve (2003), studied seven means from geometrical point of view. These means are \textit{Harmonic, Geometric, Arithmetic, Heronian, Contra-harmonic, Root-mean square and Centroidal mean}. Some of these means are particular cases of Gini's…

History and Overview · Mathematics 2012-03-13 Inder Jeet Taneja

We define the concept of self-similarity of an object by considering endomorphisms of the object as `similarity' maps. A variety of interesting examples of self-similar objects in geometry, algebra and arithmetic are introduced.…

Number Theory · Mathematics 2015-06-05 Arash Rastegar

In this paper, we present an improvement of a large sieve type inequality in high dimensions and discuss its implications on a related problem.

Number Theory · Mathematics 2007-05-23 Liangyi Zhao

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

Using isoperimetry and symmetrization we provide a unified framework to study the classical and logarithmic Sobolev inequalities. In particular, we obtain new Gaussian symmetrization inequalities and connect them with logarithmic Sobolev…

Functional Analysis · Mathematics 2008-10-02 Joaquim Martin , Mario Milman