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Results of Liflyand and collaborators on the boundedness of Hausdorff operators on the Hardy space $H^1$ over finite-dimensional real space generalized to the case of locally compact groups that are spaces of homogeneous type. Special cases…

泛函分析 · 数学 2020-11-24 Adolf Mirotin

Let E be a locally solid vector lattice. In this paper, we consider two particular vector subspaces of the space of all order bounded operators on E. With the aid of two appropriate topologies, we show that under some conditions, they…

泛函分析 · 数学 2016-11-07 Omid Zabeti

Several recent papers investigated unbounded convergences in Banach lattices. Combine all unbounded convergences, including unbounded order (norm, absolute weak, absolute weak*) convergence, we characterize L-weakly compact sets, L-weakly…

泛函分析 · 数学 2021-04-06 Zhangjun Wang , Zili Chen , Jinxi Chen

It is, by now, classical that lattices in higher rank semisimple groups have various rigidity properties. In this work, we add another such rigidity property to the list: uniform stability with respect to the family of unitary operators on…

For a non-empty locally compact Hausdorff space $X$ and a Dedekind complete normal vector lattice $E$, we show that the vector lattice of norm to order bounded operators from ${\text C}_{\text c}(X)$ or ${\text C}_0(X)$ into $E$ is…

泛函分析 · 数学 2026-04-13 Marcel de Jeu , Xingni Jiang

The rigidity problem for uniform Roe algebras was recently positively solved. Before its solution was found, there were positive solutions under the assumption of certain technical geometric conditions. In this paper, we introduce weaker…

算子代数 · 数学 2022-11-08 Bruno M. Braga , Ilijas Farah , Alessandro Vignati

In a recent paper by M. Mantoiu and M. Ruzhansky, a global pseudo-differential calculus has been developed for unimodular groups of type I. In the present article we generalize the main results to arbitrary locally compact groups of type I.…

泛函分析 · 数学 2020-08-19 M. Mantoiu , M. Sandoval

The present paper is concerned with some representatons of linear mappings of continuous functions into locally convex vector spaces, namely: If X is a complete Hausdorff locally convex vector space, then a general form of weakly compact…

泛函分析 · 数学 2012-12-07 Miloslav Duchon

In this paper, we give the definition of local variable Morrey Lorentz spaces which are a new class of functions. Also, we prove the boundedness of the Hardy Littlewood maximal operator M and Calderon Zygmund operators T on these spaces.…

泛函分析 · 数学 2021-11-09 A. Kucukaslan , V. S. Guliyev , C. Aykol , A. Serbetci

New classes of non-smooth bounded domains D, for which the embedding operator from H^1(D) into L^2(D) is compact are introduced. Examples are given and applications to scattering by rough obstacles are mentioned.

数学物理 · 物理学 2007-05-23 Vladimir Gol'dshtein , Alexander G. Ramm

Based on the work of Adams and Stuck as well as on the work of Zeghib, we classify the Lie groups which can act isometrically and locally effectively on Lorentzian manifolds of finite volume. In the case that the corresponding Lie algebra…

微分几何 · 数学 2013-05-31 Felix Günther

We demonstrate two new important properties of the 1-path-norm of shallow neural networks. First, despite its non-smoothness and non-convexity it allows a closed form proximal operator which can be efficiently computed, allowing the use of…

机器学习 · 计算机科学 2020-07-16 Fabian Latorre , Paul Rolland , Nadav Hallak , Volkan Cevher

We establish topological local rigidity for uniform lattices in compactly generated groups, extending the result of Weil from the realm of Lie groups. We generalize the classical local rigidity theorem of Selberg, Calabi and Weil to…

群论 · 数学 2017-11-15 Tsachik Gelander , Arie Levit

In this paper we introduce generalized grand Morrey spaces in the framework of quasimetric measure spaces, in the spirit of the so-called grand Lebesgue spaces. We prove a kind of reduction lemma which is applicable to a variety of…

泛函分析 · 数学 2012-04-11 Vakhtang Kokilashvili , Alexander Meskhi , Humberto Rafeiro

In this paper, we establish a comprehensive characterization of the generalized Lipschitz classes through the study of the rate of convergence of a family of semi-discrete sampling operators, of Durrmeyer type, in $L^p$-setting. To achieve…

泛函分析 · 数学 2025-11-14 Danilo Costarelli , Michele Piconi , Gianluca Vinti

We consider pairs of a non-empty compact connected and locally connected Hausdorff space and a real-valued continuous function. Our aim is to measure the difference between this kind of the pairs. In this notes we introduce new…

泛函分析 · 数学 2009-03-20 M. Montserrat Alonso Ferrero

We study the problem of extension and lifting of operators belonging to certain operator ideals, as well as that of their associated polynomials and holomorphic functions. Our results provide a characterization of $\mathcal{L}_1$ and…

泛函分析 · 数学 2011-06-28 Jesús M. F. Castillo , Ricardo García , Jesús Suárez

Motivated by Rosenthal's famous $l^1$-dichotomy in Banach spaces, Haydon's theorem, and additionally by recent works on tame dynamical systems, we introduce the class of tame locally convex spaces. This is a natural locally convex analogue…

泛函分析 · 数学 2022-04-18 Matan Komisarchik , Michael Megrelishvili

Several recent papers investigated lattice copies and unbounded convergences in Banach lattices. In this paper, we first solve the problem of RV and LA which is an extension of the well-known James distortion theorem. Using lattice copies…

泛函分析 · 数学 2022-03-17 Zhangjun Wang , Zili Chen

We study decay and smoothness properties for eigenfunctions of compact localization operators. Operators with symbols a in the wide modulation space M^{p,\infty} (containing the Lebesgue space L^p), p<\infty, and windows \f_1,\f_2 in the…

泛函分析 · 数学 2020-08-12 Federico Bastianoni , Elena Cordero , Fabio Nicola