Nous étudions des multiplicateurs de Fourier à symboles réguliers sur des groupes localement compacts. De nouveaux critères de Hörmander-Mikhlin pour des multiplicateurs spectraux et non spectraux sont établis. Notre approche se base sur trois nouveaux résultats clés. Premièrement, nous utilisons certains opérateurs maximaux dans des espaces
We investigate Fourier multipliers with smooth symbols defined over locally compact Hausdorff groups. Our main results in this paper establish new Hörmander-Mikhlin criteria for spectral and non-spectral multipliers. The key novelties which shape our approach are three. First, we control a broad class of Fourier multipliers by certain maximal operators in noncommutative
Mots-clés : Fourier multiplier, group von Neumann algebra, Sobolev dimension, Multiplicateur de Fourier, algèbre de von Neumann associée à un groupe, dimension de Sobolev.
@article{ASENS_2017__50_4_879_0, author = {Gonz\'alez-P\'erez, Adri\'an and Junge, Marius and Parcet, Javier}, title = {Smooth {Fourier} multipliers in group algebras via {Sobolev} dimension}, journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure}, pages = {879--925}, publisher = {Soci\'et\'e Math\'ematique de France. Tous droits r\'eserv\'es}, volume = {Ser. 4, 50}, number = {4}, year = {2017}, doi = {10.24033/asens.2334}, mrnumber = {3679616}, zbl = {1384.42010}, language = {en}, url = {https://www.numdam.org/articles/10.24033/asens.2334/} }
TY - JOUR AU - González-Pérez, Adrián AU - Junge, Marius AU - Parcet, Javier TI - Smooth Fourier multipliers in group algebras via Sobolev dimension JO - Annales scientifiques de l'École Normale Supérieure PY - 2017 SP - 879 EP - 925 VL - 50 IS - 4 PB - Société Mathématique de France. Tous droits réservés UR - https://www.numdam.org/articles/10.24033/asens.2334/ DO - 10.24033/asens.2334 LA - en ID - ASENS_2017__50_4_879_0 ER -
%0 Journal Article %A González-Pérez, Adrián %A Junge, Marius %A Parcet, Javier %T Smooth Fourier multipliers in group algebras via Sobolev dimension %J Annales scientifiques de l'École Normale Supérieure %D 2017 %P 879-925 %V 50 %N 4 %I Société Mathématique de France. Tous droits réservés %U https://www.numdam.org/articles/10.24033/asens.2334/ %R 10.24033/asens.2334 %G en %F ASENS_2017__50_4_879_0
González-Pérez, Adrián; Junge, Marius; Parcet, Javier. Smooth Fourier multipliers in group algebras via Sobolev dimension. Annales scientifiques de l'École Normale Supérieure, Série 4, Tome 50 (2017) no. 4, pp. 879-925. doi : 10.24033/asens.2334. https://www.numdam.org/articles/10.24033/asens.2334/
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