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We obtain inequalities for the Riesz means for the discrete spectrum of a class of self-adjoint compact integral operators. Such bounds imply some inequalities for the counting function of the Dirichlet boundary problem for the Laplace…

Analysis of PDEs · Mathematics 2019-06-21 Ari Laptev , Andrei Velicu

The recent extensions of domain theory have proved particularly efficient to study lattice-valued maxitive measures, when the target lattice is continuous. Maxitive measures are defined analogously to classical measures with the supremum…

General Topology · Mathematics 2013-01-03 Paul Poncet

We give an improvement of sharp Berezin type bounds on the Riesz means $\sum_k(\Lambda-\lambda_k)_+^\sigma$ of the eigenvalues $\lambda_k$ of the Dirichlet Laplacian in a domain if $\sigma\geq 3/2$. It contains a correction term of the…

Spectral Theory · Mathematics 2007-12-03 Timo Weidl

In this note we obtain a version of the well-known Riesz's theorem on conjugate harmonic functions for Lumer's Hardy spaces $(Lh)^2(\Omega)$ on arbitrary domains $\Omega$: If a real-valued harmonic function $U\in (Lh)^2(\Omega)$ has a…

Complex Variables · Mathematics 2020-10-05 Marijan Markovic

Using a generalized Littlewood theorem concerning integrals of the logarithm of analytical functions, we have established a few equalities involving integrals of the logarithm of the Riemann Zeta-function and have rigorously proven that…

Number Theory · Mathematics 2008-06-11 Sergey K. Sekatskii , Stefano Beltraminelli , Danilo Merlini

We prove some properties of positive polynomial mappings between Riesz spaces, using finite difference calculus. We establish the polynomial analogue of the classical result that positive, additive mappings are linear. And we prove a…

Functional Analysis · Mathematics 2016-07-22 James Cruickshank , John Loane , Raymond A. Ryan

We establish necessary and sufficient conditions on a weight pair $(v,w)$ governing the boundedness of the Riesz potential operator $I_{\alpha}$ defined on a homogeneous group $G$ from $L^p_{dec,r}(w, G)$ to $L^q(v, G)$, where…

Functional Analysis · Mathematics 2014-06-24 Alexander Meskhi , Ghulam Murtaza , Muhammad Sarwar

A formal description of a functional analysis approach to the Riemann zeta-functional equation that provides in principle an infinity of different proofs based on work by the author on the existence of dilation-invariant unitary operators…

Number Theory · Mathematics 2007-05-23 Luis Baez-Duarte

Applying the solution to the Kadison-Singer problem, we show that every subset $\mathcal{S}$ of the torus of positive Lebesgue measure admits a Riesz sequence of exponentials $\left\{ e^{i\lambda x}\right\} _{\lambda \in \Lambda}$ such that…

Classical Analysis and ODEs · Mathematics 2019-07-11 Marcin Bownik , Itay Londner

It is not usual to characterize an operator valued series via completeness of multiplier spaces. In this study, by using a series of bounded linear operators, we introduce the space $M^\infty_{R}\big(\sum_k T_k\big)$ of Riesz summability…

Functional Analysis · Mathematics 2021-02-18 Mahmut Karakuş , Ramazan Kama

The ultrapower theorem of Keisler-Shelah allows such model-theoretic notions as elementary equivalence, elementary embedding and existential embedding to be couched in the language of categories (limits, morphism diagrams). This in turn…

Logic · Mathematics 2008-02-03 Paul Bankston

We introduce a novel real-valued endogenous logic for expressing properties of probabilistic transition systems called Riesz modal logic. The design of the syntax and semantics of this logic is directly inspired by the theory of Riesz…

Logic in Computer Science · Computer Science 2023-06-22 Robert Furber , Radu Mardare , Matteo Mio

We develop new local $T1$ theorems to characterize Calder\'on-Zygmund operators that extend boundedly or compactly on $L^{p}(\mathbb R^{n},\mu)$ with $\mu$ a measure of power growth. The results, whose proofs do not require random grids,…

Classical Analysis and ODEs · Mathematics 2021-04-06 Paco Villarroya

We investigate the relationship between the maximum of the zeta function on the 1-line and the maximal order of $S(t)$, the error term in the number of zeros up to height $t$. We show that the conjectured upper bounds on $S(t)$ along with…

Number Theory · Mathematics 2018-12-05 Winston Heap

This article describes a sequence of rational functions which converges locally uniformly to the zeta function. The numerators (and denominators) of these rational functions can be expressed as characteristic polynomials of matrices that…

Number Theory · Mathematics 2019-06-28 Keith Ball

In this paper, we show that there is a one-to-one correspondence between operator monotone functions on the nonnegative reals and finite Borel measures on the unit interval. This correspondence appears as an integral representation of…

Functional Analysis · Mathematics 2013-05-01 Pattrawut Chansangiam

The discrete data encoded in the power moments of a positive measure, fast decaying at infinity on euclidean space, is incomplete for recovery, leading to the concept of moment indeterminateness. On the other hand, classical integral…

Functional Analysis · Mathematics 2023-08-01 David P. Kimsey , Mihai Putinar

We develop and use some key concepts of potential theory, such as balayage and duality between measures and their potentials, to study the distribution of masses of subharmonic functions while restrictions to their growth near the boundary…

Complex Variables · Mathematics 2020-02-11 Bulat N. Khabibullin , Enzhe B. Menshikova

The finite Hilbert transform $T$, when acting in the classical Zygmund space $\logl$ (over $(-1,1)$), was intensively studied in \cite{curbera-okada-ricker-log}. In this note an integral representation of $T$ is established via the…

Functional Analysis · Mathematics 2024-06-25 Guillermo P. Curbera , Susumu Okada , Werner J. Ricker

A direct proof of the Riesz representation theorem is provided. This theorem characterizes the linear functionals acting on the vector space $C(K)$ of continuous functions defined on a compact subset $K$ of the real numbers $\mathbb{R}$.…

Functional Analysis · Mathematics 2017-07-07 Rafael del Rio , Asaf Franco , Jose Lara