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In this paper, we investigate the convergence properties of Fourier partial sums associated with general orthonormal systems, focusing on functions that belong to specific differentiable function classes. While classical Fourier analysis…

General Mathematics · Mathematics 2025-09-25 Giorgi Tutberidze , Vakhtang Tsagareishvili , Giorgi Cagareishvili

We generalize the definition of alpha invariant to arbitrary codimension. We also give a lower bound of these alpha invariants for K-semistable Q-Fano varieties and show that we can characterize projective spaces among all K-semistable Fano…

Algebraic Geometry · Mathematics 2020-01-28 Ziwen Zhu

We prove several new transversality results for formal CR maps between formal real hypersurfaces in complex space. Both cases of finite and infinite type hypersurfaces are tackled in this note.

Complex Variables · Mathematics 2015-06-26 Bernhard Lamel , Nordine Mir

In this paper, we consider the versal deformations of three dimensional Lie algebras. We classify Lie algebras and study their deformations by using linear algebra techniques to study the cohomology. We will focus on how the deformations…

Quantum Algebra · Mathematics 2007-05-23 Carolyn Otto , Michael Penkava

The paper tries to extend results of the classical Descriptive Set Theory to as many countably based T_0-spaces (cb_0-spaces) as possible. Along with extending some central facts about Borel, Luzin and Hausdorff hierarchies of sets we…

General Topology · Mathematics 2014-06-17 Victor Selivanov

In this paper we introduce a generalization of Hilbert C-modules which are pre- Finsler module namely C-semi-inner product spaces. Some properties and results of such spaces are investigated, specially the orthogonality in these spaces will…

Functional Analysis · Mathematics 2013-09-06 Saeedeh Shamsi Gamchi , Mohammad Janfada , Asadollah Niknam

In a recent paper, we have shown that warped time-frequency representations provide a rich framework for the construction and study of smoothness spaces matched to very general phase space geometries obtained by diffeomorphic deformations…

Functional Analysis · Mathematics 2024-07-24 Nicki Holighaus , Felix Voigtlaender

In computable topology, a represented space is called computably discrete if its equality predicate is semidecidable. While any such space is classically isomorphic to an initial segment of the natural numbers, the computable-isomorphism…

Logic · Mathematics 2025-12-12 Eike Neumann , Arno Pauly , Cécilia Pradic , Manlio Valenti

We consider in this paper the $FRS$-deformations of a family of space curves with codimension $\leq 3$. Some geometric aspects of a space curve such as flattenings, vertices and twistings points has been studied.

Differential Geometry · Mathematics 2017-12-27 Pouya Mehdipour , Mostafa Salarinoghabi

In this article, we study Dorroh extensions of algebras and Dorroh extensions of coalgebras. Their structures are described. Some properties of these extensions are presented. We also introduce the finite duals of algebras and modules which…

Rings and Algebras · Mathematics 2020-07-07 Lan You , Hui-Xiang Chen

The function spaces of continuously differentiable functions are extensively studied and appear in various mathematical settings. In this context, we investigate the spaces of continuously fractional differentiable functions of order…

Functional Analysis · Mathematics 2025-04-01 Paulo M. Carvalho-Neto , Renato Fehlberg Júnior

In this paper, we give a complete list of strongly tempered hyperspherical Hamiltonian spaces. We show that the period integrals attached to the list contains many previously studied Rankin-Selberg integrals and period integrals, thus give…

Number Theory · Mathematics 2026-03-11 Zhengyu Mao , Chen Wan , Lei Zhang

We construct a q-deformed version of the conformal quantum mechanics model of de Alfaro, Fubini and Furlan for which the deformation parameter is complex and the unitary time evolution of the system is preserved. We also study differential…

High Energy Physics - Theory · Physics 2009-10-31 Donam Youm

The injective right comodules appearing in the minimal injective resolution of a finite-dimensional comodule need not to be of finite dimension or even quasi-finite. The obstruction here is that factor comodules of quasi-finite comodules…

Rings and Algebras · Mathematics 2007-05-23 J. Gomez-Torrecillas , C. Nastasescu , B. Torrecillas

The article is dedicated to q-deformed versions of spinor calculus. As a kind of review, the most relevant properties of the two-dimensional quantum plane are summarized. Additionally, the relationship between the quantum plane and…

High Energy Physics - Theory · Physics 2007-05-23 Alexander Schmidt , Hartmut Wachter

Surfaces with concentric $K$-contours and parallel $K$-contours in Euclidean $3$-space are defined. Crucial examples are presented and characterization of them are given.

Differential Geometry · Mathematics 2024-04-23 Shoichi Fujimori , Yu Kawakami , Masatoshi Kokubu

In this paper a systematic study of the category GTS of generalized topological spaces (in the sense of H. Delfs and M. Knebusch) and their strictly continuous mappings begins. Some completeness and cocompleteness results are achieved.…

Logic · Mathematics 2020-09-09 Artur Piȩkosz

Explicit bases for the spaces of holomorphic cusp forms of all even positive weights and all orders are constructed. The dimensions of these spaces are computed.

Number Theory · Mathematics 2007-06-13 Nikolaos Diamantis , David Sim

In the preceding note math.DG/0610917 the $\Lambda_{k-1}\mathcal{C}$--spectral sequence, whose first term is composed of \emph{secondary iterated differential forms}, was constructed for a generic diffiety. In this note the zero and first…

Differential Geometry · Mathematics 2010-05-05 A. M. Vinogradov , L. Vitagliano

We discuss the kappa-deformed phase space obtained as a cross product algebra of the deformed translations algebra and its dual configuration space. We consider two kinds of the kappa-deformed uncertainty relations.

q-alg · Mathematics 2008-02-03 Anatol Nowicki
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