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In this paper, we improve the moment estimates for the gaps between numbers that can be represented as a sum of two squares of integers. We consider certain sum of Bessel functions and prove the upper bound for its weighted mean value. This…

Number Theory · Mathematics 2019-08-15 Alexander Kalmynin

In this paper, we are interested in investigating a weighted variant of Hermite-Hadamard type inequalities involving convex functionals. The approach undertaken makes it possible to refine and reverse certain inequalities already known in…

Functional Analysis · Mathematics 2024-05-21 Mustapha Raissouli , Mohamed Chergui , Lahcen Tarik

The purpose of the paper is to present an short proof of the Chuang's inequality.

Complex Variables · Mathematics 2017-12-05 Bikash Chakraborty

First we generalize a famous lemma of Gallagher on the mean square estimate for exponential sums by plugging a weight in the right hand side of Gallagher's original inequality. Then we apply it in the special case of the Cesaro weight, in…

Number Theory · Mathematics 2016-04-21 Giovanni Coppola , Maurizio Laporta

We study certain double--series inequalities, which are motivated by weighted Hardy inequalities.

Classical Analysis and ODEs · Mathematics 2011-12-20 Peng Gao

In this note we are concerned about the generalization of the GHS inequality for the Potts model. We also obtain by a different method the proof of the GHS inequality for the Ising model. We take advantage of a polynomial expansion and we…

Probability · Mathematics 2010-06-17 Sergio de Carvalho Bezerra

We prove a weighted version of the Hardy-Littlewood-Sobolev inequality for radially symmetric functions, and show that the range of admissible power weights appearing in the classical inequality due to Stein and Weiss can be improved in…

Classical Analysis and ODEs · Mathematics 2009-12-07 Pablo L. De Napoli , Irene Drelichman , Ricardo G. Duran

We give a remarkably elementary proof of the Brouwer fixed point theorem. The proof is verifiable for most of the mathematicians.

History and Overview · Mathematics 2011-09-22 Yukio Takeuchi , Tomonari Suzuki

A variant of the well-known Chebyshev inequality for scalar random variables can be formulated in the case where the mean and variance are estimated from samples. In this paper we present a generalization of this result to multiple…

Methodology · Statistics 2017-09-29 Bartolomeo Stellato , Bart Van Parys , Paul J. Goulart

This article contains the proof of a theorem on orthogonal-Pin duality that was cited without proof in a previous article in this journal.

Mathematical Physics · Physics 2023-07-11 K. Neergård

Let Riemannian metrics $g$ and $\bar g$ on a connected manifold $M^n$ have the same geodesics (considered as unparameterized curves). Suppose the eigenvalues of one metric with respect to the other are all different at a point. Then, by the…

Differential Geometry · Mathematics 2011-08-08 Vladimir S. Matveev

In the paper, we establish an inequality involving the gamma and digamma functions and use it to prove the negativity and monotonicity of a function involving the gamma and digamma functions.

Classical Analysis and ODEs · Mathematics 2016-06-30 Feng Qi , Bai-Ni Guo

The theorem of Mather on generic projections of smooth algebraic varieties is also proved for the singular ones.

Algebraic Geometry · Mathematics 2007-05-23 A. Alzati , E. Ballico , G. Ottaviani

In this paper the geometric mean of partial positive definite matrices with missing entries is considered. The weighted geometric mean of two sets of positive matrices is defined, and we show whether such a geometric mean holds certain…

Functional Analysis · Mathematics 2018-11-05 Hayoung Choi , Sejong Kim , Yuanming Shi

We use that the $n$-sphere for $n\geq 2$ is simply-connected to prove the Poincar\'e-Birkhoff-Witt Theorem.

Rings and Algebras · Mathematics 2018-01-23 Michael Eastwood

Inspired by the recent work by R.Pal et al., we give further refined inequalities for a convex Riemann integrable function, applying the standard Hermite-Hadamard inequality. Our approach is different from their one in \cite{PSMA2016}. As…

Classical Analysis and ODEs · Mathematics 2020-04-08 Shigeru Furuichi , Nicuşor Minculete

In this note, we demonstrate the convergence of the Demailly approximation of a general (weakly) upper semi-continuous weight.

Complex Variables · Mathematics 2025-04-03 Shijie Bao , Qi'an Guan

We give a purely combinatorial proof for a two-fold generalization of van der Waerden-Brauer's theorem and Hindman's theorem. We also give tower bounds for a finite version of it.

Combinatorics · Mathematics 2019-05-07 Shahram Mohsenipour

We give an equivalent form of the Twin prime conjecture relating to a symmetric property that is observed for terms present in a certain sequence of arithmetic progressions defined for a pair of co-prime integers.

Number Theory · Mathematics 2026-03-10 Srikanth Cherukupally

In this paper, we provide formulas for partial sums of weighted averages over regular integers modulo $n$ of the $\gcd$-sum function with any arithmetic function. Many interesting applications of the results are also given.

Number Theory · Mathematics 2021-05-26 Waseem Alass