A Beurling-Helson type theorem for modulation spaces

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dc.creatorOkoudjou, Kasso A
dc.date2008-01-09
dc.date.accessioned2026-07-07T08:53:28Z
dc.date.available2026-07-07T08:53:28Z
dc.descriptionWe prove a Beurling-Helson type theorem on modulation spaces. More precisely, we show that the only $\mathcal{C}^{1}$ changes of variables that leave invariant the modulation spaces $\M{p,q}(\rd)$ are affine functions on $\rd$. A special case of our result involving the Sjöstrand algebra was considered earlier by A. Boulkhemair.
dc.identifierhttps://arxiv.org/abs/0801.1338
dc.identifierhttp://arxiv.org/abs/0801.1338
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/145631
dc.subjectClassical Analysis and ODEs
dc.subjectFunctional Analysis
dc.subject42B15; 42A45; 42B35
dc.titleA Beurling-Helson type theorem for modulation spaces
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