Abstract
We extended the known result that symbols from modulation spaces \(M^{\infty ,1}(\mathbb {R}^{2n})\), also known as the Sjöstrand’s class, produce bounded operators in \(L^2(\mathbb {R}^n)\), to general \(L^p\) boundedness at the cost of loss of derivatives. Indeed, we showed that pseudo-differential operators acting from \(L^p\)-Sobolev spaces \(L^p_s(\mathbb {R}^n)\) to \(L^p(\mathbb {R}^n)\) spaces with symbols from the modulation space \(M^{\infty ,1}(\mathbb {R}^{2n})\) are bounded, whenever \(s\ge n|1/p-1/2|.\) This estimate is sharp for all \(1< p<\infty \).
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The author would like to thank Professor Mitsuru Sugimoto for his valuable comments for improving the result of this work. He also thank the referees for their suggestions and corrections that led to a better presentation of the paper.
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Communicated by Karlheinz Gröchenig.
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Cunanan, J. On \(L^p\)-Boundedness of Pseudo-Differential Operators of Sjöstrand’s Class. J Fourier Anal Appl 23, 810–816 (2017). https://doi.org/10.1007/s00041-016-9490-x
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DOI: https://doi.org/10.1007/s00041-016-9490-x