The class of convolution operators on the Marcinkiewicz spaces
Annales de l'Institut Fourier, Tome 31 (1981) no. 3, pp. 225-243.

On considère la classe des opérateurs de convolution Φμ:XXX est un espace convenable de fonctions sur R. Soit 𝒯X la fermeture de cette classe dans la norme des opérateurs. Soit rp le sous-espace des fonctions régulières dans l’espace de Marcinkiewicz p, 1p<. Nous montrons que l’espace 𝒯rp est isométriquement isomorphe à 𝒯Lp et que la convergence d’une suite d’opérateurs dans la topologie forte des opérateurs est équivalente à la convergence en norme. Nous obtenons aussi quelques résultats sur l’action de la transformation de Wiener sur les opérateurs de convolution, et comme application, nous trouvons une extension d’un théorème taubérien de Wiener.

Let 𝒯X denote the operator-norm closure of the class of convolution operators Φμ:XX where X is a suitable function space on R. Let rp be the closed subspace of regular functions in the Marinkiewicz space p, 1p<. We show that the space 𝒯rp is isometrically isomorphic to 𝒯Lp and that strong operator sequential convergence and norm convergence in 𝒯rp coincide. We also obtain some results concerning convolution operators under the Wiener transformation. These are to improve a Tauberian theorem of Wiener on 2.

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     title = {The class of convolution operators on the {Marcinkiewicz} spaces},
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Lau, Ka-Sing. The class of convolution operators on the Marcinkiewicz spaces. Annales de l'Institut Fourier, Tome 31 (1981) no. 3, pp. 225-243. doi : 10.5802/aif.845. https://www.numdam.org/articles/10.5802/aif.845/

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  • Andreano, F.; Picardello, M. A. Approximate identities on some homogeneous Banach spaces, Monatshefte für Mathematik, Volume 158 (2009) no. 3, p. 235 | DOI:10.1007/s00605-009-0106-2

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