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In this paper various properties of global and local changes of variables as well as properties of canonical transforms are investigated on modulation and Wiener amalgam spaces. We establish several relations among localisations of…

Functional Analysis · Mathematics 2012-08-07 Michael Ruzhansky , Mitsuru Sugimoto , Joachim Toft , Naohito Tomita

In this paper, we give a approximation characterization, embedding properties and the duality of matrix weighted modulation spaces.

Functional Analysis · Mathematics 2024-08-29 Shengrong Wang , Pengfei Guo , Jingshi Xu

We consider multiplication properties of elements in weighted Fourier Lebesgue and modulation spaces. Especially we extend some results by Pilipovic, Teofanov and Toft (2010).

Functional Analysis · Mathematics 2012-08-27 Karoline Johansson , Stevan Pilipovic , Nenad Teofanov , Joachim Toft

We establish a weighted inequality for fractional maximal and convolution type operators, between weak Lebesgue spaces and Wiener amalgam type spaces on $ \mathbb R $ endowed with a measure which needs not to be doubling.

Classical Analysis and ODEs · Mathematics 2018-10-05 Aïssata Adama , Justin Feuto , Ibrahim Fofana

This paper is devoted to give several characterizations on a more general level for the boundedness of $\tau$-Wigner distributions acting from weighted modulation spaces to weighted modulation and Wiener amalgam spaces. As applications,…

Functional Analysis · Mathematics 2020-11-10 Weichao Guo , Jiecheng Chen , Dashan Fan , Guoping Zhao

We characterise modulation spaces by suitable Wiener estimates on the short-time Fourier transforms of the involved functions and distributions. We use the results to refine some formulae on periodic distributions with Lebesgue estimates on…

Functional Analysis · Mathematics 2019-03-20 Joachim Toft

In this paper we first prove the metric approximation property for weighted mixed-norm $L_w^{(p_1,\dots ,p_n)}$ spaces. Using Gabor frame representation this implies that the same property holds in weighted modulation and Wiener amalgam…

Functional Analysis · Mathematics 2016-03-10 Julio Delgado , Michael Ruzhansky , Baoxiang Wang

We establish sharp convolution and multiplication estimates in weighted Lebesgue, Fourier Lebesgue and modulation spaces. Especially we recover some known results.

Functional Analysis · Mathematics 2013-01-28 Joachim Toft , Karoline Johansson , Stevan Pilipovic , Nenad Teofanov

We give sufficient and necessary conditions on the Lebesgue exponents for the Weyl product to be bounded on modulation spaces. The sufficient conditions are obtained as the restriction to $N=2$ of a result valid for the $N$-fold Weyl…

Functional Analysis · Mathematics 2016-04-27 Elena Cordero , Joachim Toft , Patrik Wahlberg

In this paper, we give several characterizations for the boundedness of multilinear Rihaczek distributions acting from Wiener amalgam spaces to modulation and Fourier modulation spaces. Moreover, we establish the crucial self-improvement…

Functional Analysis · Mathematics 2024-10-08 Weichao Guo , Guoping Zhao

In this paper we discuss the structure of weighted weak Lebesgue spaces and weighted weak Orlicz spaces on $\mathbb{R}^n$. First, we present sufficient and necessary conditions for inclusion relation between weighted weak Lebesgue spaces.…

Functional Analysis · Mathematics 2017-10-13 Al Azhary Masta , Ifronika , Muhammad Taqiyuddin

We study the existence of the product of two weighted modulation spaces. For this purpose we discuss two different strategies. The more simple one allows transparent proofs in various situations. However, our second method allows a closer…

Functional Analysis · Mathematics 2016-02-02 Maximilian Reich , Winfried Sickel

We give the sharp conditions for boundedness of Hausdorff operators on certain modulation and Wiener amalgam spaces.

Classical Analysis and ODEs · Mathematics 2018-11-14 Guoping Zhao , Dashan Fan , Weichao Guo

We obtain convolution inequalities in Lebesgue and Lorentz spaces with power weights when the functions involved are assumed to be radially symmetric. We also present applications of these results to inequalities for Riesz potentials of…

Classical Analysis and ODEs · Mathematics 2013-08-01 Pablo L. De Nápoli , Irene Drelichman

We characterize the rearrangement-invariant hull, with respect to a given measure $\mu$, of weighted Lebesgue spaces. The solution leads us to first consider when this space is contained in the sum of $(L^1 + L^\infty)(R, \mu)$ and the…

Functional Analysis · Mathematics 2024-04-26 Martin Křepela , Zdeněk Mihula , Javier Soria

Exploiting continuity properties of Fourier multipliers on modulation spaces and Wiener amalgam spaces, we study the Cauchy problem for the NLW equation. Local wellposedness for rough data in modulation spaces and Wiener amalgam spaces is…

Analysis of PDEs · Mathematics 2016-06-28 Elena Cordero , Fabio Nicola

We prove sharp estimates for the dilation operator $f(x)\longmapsto f(\lambda x)$, when acting on Wiener amalgam spaces $W(L^p,L^q)$. Scaling arguments are also used to prove the sharpness of the known convolution and pointwise relations…

Functional Analysis · Mathematics 2016-06-28 Elena Cordero , Fabio Nicola

Our aim in this paper is to characterize local Muckenhoupt weighted Lebesgue spaces with variable exponent by compactly supported smooth wavelets. We also investigate necessary and sufficient conditions for the corresponding modular…

Functional Analysis · Mathematics 2019-12-10 Mitsuo Izuki , Toru Nogayama , Takahiro Noi , Yoshihiro Sawano

We define Wiener amalgam spaces of (quasi)analytic ultradistributions whose local components belong to a general class of translation and modulation invariant Banach spaces of ultradistributions and their global components are either…

Functional Analysis · Mathematics 2022-10-21 Pavel Dimovski , Bojan Prangoski

In this article, notations are included in Section 1. In Section 2, we define the grand Wiener amalgam space by using the classical Wiener amalgam space [9, 15, 16, 17] and the generalized grand Lebesgue space [18, 13] . Section 3, concerns…

Functional Analysis · Mathematics 2018-11-22 A. Turan Gurkanli
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