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We define canonical real analytic versions of modular forms of integral weight for the full modular group, generalising real analytic Eisenstein series. They are harmonic Maass waveforms with poles at the cusp, whose Fourier coefficients…

Number Theory · Mathematics 2017-11-07 Francis Brown

In this paper we obtained some direct and inverse theorems of approximation theory for $\psi$-differentiable functions in the metric weighted Orlicz spaces with weights, which belong to the class of Muckenhoupt.

Classical Analysis and ODEs · Mathematics 2015-01-13 Stanislav Chaichenko

We study the continuity and compactness of embeddings for radial Besov and Triebel-Lizorkin spaces with weights in the Muckenhoupt class $A_\infty$. The main tool is a discretization in terms of an almost orthogonal wavelet expansion…

Classical Analysis and ODEs · Mathematics 2015-04-07 Pablo L. De Nápoli , Irene Drelichman , Nicolas Saintier

This paper is concerned with frame decompositions of $\alpha$-modulation spaces. These spaces can be obtained as coorbit spaces for square-integrable representations of the affine Weyl-Heisenberg group modulo suitable subgroups. The theory…

Functional Analysis · Mathematics 2014-08-22 Peter Balazs , Dominik Bayer , Michael Speckbacher

The paper present new definitions for weighted DT moduli. Similarly, we a general outcome in an equivalence of moduli of smoothness are obtained. It is known that, any $r \in \mathbb{N}_{\circ}$ , $0<p \leq \infty$, $1 \leq \eta \leq r$ and…

Functional Analysis · Mathematics 2020-06-11 Malik Saad Al-Muhja , Habibulla Akhadkulov , Nazihah Ahmad

Let $M$ be a Hopf--von Neuman algebra with the predual $M_*$ and $WAP(M)$ the subspace in $M$ composed of weakly almost periodic functionals on $M_*$. The main example of such an algebra is $M=L^\infty(\mathbb G)$ for a locally compact…

Operator Algebras · Mathematics 2022-06-28 Yulia Kuznetsova

Let $M$ be a smooth manifold equipped with a conformal structure, $E[w]$ the space of densities with the the conformal weight $w$ and $D_{w,w+\de}$ the space of differential operators from $E[w]$ to $E[w+\delta]$. Conformal quantization $Q$…

Differential Geometry · Mathematics 2009-03-30 Josef Silhan

We deduce factorization properties for a quasi-Banach module over a quasi-Banach algebra. Especially we extend a result by Hewitt and prove that if any such algebra which possess a bounded left approximate identity, then any element in the…

Functional Analysis · Mathematics 2024-05-14 Divyang Bhimani , Joachim Toft

We introduce a new ladder of function spaces which is shown to fill in the gap between the weak $L^{p\infty}$ spaces and the larger Morrey spaces, $M^p$. Our motivation for introducing these new spaces, denoted $\V^{pq}$, is to gain a more…

Analysis of PDEs · Mathematics 2009-11-07 Eitan Tadmor

We introduce a new class of weighted local approximate atoms including classical weighted local atoms. Then we further obtain the weighted local approximate atomic decompositions of weighted local Hardy spaces $h_{\omega} ^p(R^n)$ with…

Functional Analysis · Mathematics 2023-11-14 Haijing Zhao , Xuechun Yang , Baode Li

We introduce new weighted $L^p$-type spaces defined in terms of weight function matrices and characterize the inclusion relations in terms of the defining matrices. Moreover, we provide a detailed study concerning the coincidence with the…

Functional Analysis · Mathematics 2026-04-24 Gerhard Schindl

We characterize the weights for the Stieltjes transform and the Calder\'on operator to be bounded on the weighted variable Lebesgue spaces $L_w^{p(\cdot)}(0,\infty)$, assuming that the exponent function $p(\cdot)$ is log-H\"older continuous…

Classical Analysis and ODEs · Mathematics 2019-01-23 David Cruz-Uribe , Estefania Dalmasso , Francisco Martin-Reyes , Pedro Ortega Salvador

Let $(X, d, \mu)$ be a space of homogeneous type, i.e. the measure $\mu$ satisfies doubling (volume) property with respect to the balls defined by the metric $d$. Let $L$ be a non-negative self-adjoint operator on $L^2(X)$. Assume that the…

Classical Analysis and ODEs · Mathematics 2012-09-28 The Anh Bui , Xuan Thinh Duong

We present some applications of the Kudla-Millson and the Millson theta lift. The two lifts map weakly holomorphic modular functions to vector valued harmonic Maass forms of weight $3/2$ and $1/2$, respectively. We give finite algebraic…

Number Theory · Mathematics 2020-06-19 Jan Hendrik Bruinier , Markus Schwagenscheidt

In this paper quantitative weighted matrix estimates for vector valued extensions of $L^{r'}$-H\"ormander operators and rough singular integrals are studied. Strong type $(p,p)$ estimates, endpoint estimates, and some new results on…

Classical Analysis and ODEs · Mathematics 2021-03-25 Pamela A. Muller , Israel P. Rivera-Ríos

We show that equivariant tilting modules over equivariant algebras induce equivalences of derived factorization categories. As an application, we show that the derived category of a noncommutative resolution of a linear section of a…

Algebraic Geometry · Mathematics 2021-06-03 Yuki Hirano

Using the theory introduced by Casper and Yakimov, we investigate the structure of algebras of differential and difference operators acting on matrix valued orthogonal polynomials (MVOPs) on $\mathbb{R}$, and we derive algebraic and…

Classical Analysis and ODEs · Mathematics 2020-11-17 Alfredo Deaño , Bruno Eijsvoogel , Pablo Román

We discuss some properties of the moduli of smoothness with Jacobi weights that we have recently introduced and that are defined as \[ \omega_{k,r}^\varphi(f^{(r)},t)_{\alpha,\beta,p} :=\sup_{0\leq h\leq t} \left\|…

Classical Analysis and ODEs · Mathematics 2019-01-15 K. A. Kopotun , D. Leviatan , I. A. Shevchuk

We develop a unified construction of matrix-valued orthogonal polynomials associated with discrete weights, yielding bispectral sequences as eigenfunctions of second-order difference operators. This general framework extends the discrete…

Classical Analysis and ODEs · Mathematics 2025-09-12 I. Bono Parisi

We prove weighted estimates for singular integral operators which operate on function spaces on a half-line. The class of admissible weights includes Muckenhoupt weights and weights satisfying Sawyer's one-sided conditions. The kernels of…

Classical Analysis and ODEs · Mathematics 2014-10-15 Ralph Chill , Sebastian Krol