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We analyze in detail projective modules over two-dimensional noncommutative tori and complex structures on these modules.We concentrate our attention on properties of holomorphic vectors in these modules; the theory of these vectors…

Quantum Algebra · Mathematics 2007-05-23 Momar Dieng , Albert Schwarz

Certain solvable extensions of $H$-type groups provide noncompact counterexamples to the so-called Lichnerowicz conjecture, which asserted that ``harmonic'' Riemannian spaces must be rank 1 symmetric spaces.

Differential Geometry · Mathematics 2009-09-25 Ewa Damek , Fulvio Ricci

We study some mapping properties of Volterra type integral operators and composition operators on model spaces. We also discuss and give out a couple of interesting open problems in model spaces where any possible solution of the problems…

Complex Variables · Mathematics 2015-07-16 Tesfa Mengestie

We prove that there are relative $\mathrm{SO}_0(2,q)$-character varieties of the punctured sphere which are compact, totally non-hyperbolic and contain a dense representation. This work fills a remaining case of the results of N. Tholozan…

Differential Geometry · Mathematics 2025-09-19 Yu Feng , Junming Zhang

This is a detailed introductory survey of the cohomological dimension theory of compact metric spaces.

General Topology · Mathematics 2007-05-23 A. N. Dranishnikov

In this paper, we give a Littlewood-Paley characterization for the H\"older-Zygmund spaces $\mathcal{C}^{\sigma}(G)$ ($0< \sigma <\infty$) on a stratified Lie group $G$.

Classical Analysis and ODEs · Mathematics 2016-08-19 Guorong Hu

Characterizations of the associated spaces and second associated spaces of the Hardy space on $\mathbb{R}^n$ are given. Some results on the associated spaces of the $\textrm{BMO}(\mathbb{R}^n)$ space are proved also.

Functional Analysis · Mathematics 2023-10-31 Dmitrii V. Prokhorov

We describe $\sigma$-matching, interchangeable and, as a consequence, totally compatible products on null-filiform associative algebras.

Rings and Algebras · Mathematics 2026-03-10 Kobiljon Abdurasulov , Jobir Adashev , Feruza Toshtemirova

A class of Cantor-type spaces and related geometric structures are discussed.

Classical Analysis and ODEs · Mathematics 2007-11-09 Stephen Semmes

In this paper, we investigate the geometry of compact spacelike biconservative hypersurfaces with constant scalar curvature in de Sitter space $\mathbb{S}_1^{m+1}(c)$, under some geometric constraints. Our results extend the understanding…

Differential Geometry · Mathematics 2025-06-06 Aykut Kayhan

We consider the logic space of countable (enumerated) groups and show that closed subspaces corresponding to some standard classes of groups have (do not have) generic groups. We also discuss the cases of semigroups and associative rings.

Logic · Mathematics 2025-12-03 Aleksander Ivanov , Krzysztof Majcher

This note comprises a synthesis of certain results in the theory of exact interpolation between Hilbert spaces. In particular, we examine various characterizations of interpolation spaces and their relations to a number of results in…

Functional Analysis · Mathematics 2019-07-02 Yacin Ameur

The aim of this paper is to continue the study of sg-compact spaces. The class of sg-compact spaces is a proper subclass of the class of hereditarily compact spaces. In our paper we shall consider sg-compactness in product spaces. Our main…

General Topology · Mathematics 2007-05-23 Julian Dontchev , Maximilian Ganster

We review the projective-superspace construction of four-dimensional N=2 supersymmetric sigma models on (co)tangent bundles of the classical Hermitian symmetric spaces.

High Energy Physics - Theory · Physics 2008-11-26 Masato Arai , Sergei M. Kuzenko , Ulf Lindstrom

We introduce noncommutative weak Orlicz spaces associated with a weight and study their properties. We also define noncommutative weak Orlicz-Hardy spaces and characterize their dual spaces.

Operator Algebras · Mathematics 2021-09-17 Turdebek N. Bekjan , Madi Raikhan

We introduce a classification of locally compact Hausdorff topological spaces with respect to the behavior of $\sigma$-compact subsets, and relying on this classification we study properties of corresponding $C^*$-algebras in terms of frame…

Operator Algebras · Mathematics 2022-06-22 Denis Fufaev

We characterize the topology of the Glimm space of a separable C*-algebra and extend the main result of [6] to non-unital AF C*-algebras.

Operator Algebras · Mathematics 2015-09-22 Aldo J. Lazar , Douglas W. B. Somerset

We consider the sigma-product of the $\omega_{1}$-power of the Hilbert cube. This space is characterized among its retracts as the only one without $G_{\delta}$-points.

General Topology · Mathematics 2007-05-23 A. Chigogidze

We construct a new compactification of the moduli space H_g of smooth hyperelliptic curves of genus g. We compare our compactification with other well-known remarkable compactifications of H_g .

Algebraic Geometry · Mathematics 2007-06-13 Marco Pacini

We provide a simple proof that conformally semi-symmetric spacetimes are actually semi-symmetric. We also present a complete refined classification of the semi-symmetric spacetimes.

Differential Geometry · Mathematics 2015-05-14 Ingemar Eriksson , José M. M. Senovilla
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