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OPERATING FUNCTIONS ON MODULATION AND WIENER AMALGAM SPACES

  • MASAHARU KOBAYASHI (a1) and ENJI SATO (a2)

Abstract

The goal of this paper is to characterize the operating functions on modulation spaces $M^{p,1}(\mathbb{R})$ and Wiener amalgam spaces $W^{p,1}(\mathbb{R})$ . This characterization gives an affirmative answer to the open problem proposed by Bhimani (Composition Operators on Wiener amalgam Spaces, arXiv: 1503.01606) and Bhimani and Ratnakumar (J. Funct. Anal. 270 (2016), pp. 621–648).

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