Mutual estimates of time-frequency representations and uncertainty principles

In this paper we give different estimates between Lebesgue norms of quadratic time-frequency representations. We show that, in some cases, it is not possible to have such bounds in classical $L^p$ spaces, but the Lebesgue norm needs to be suitably weighted. This leads to consider weights of polynomial type, and, more generally, of ultradifferentiable type, and this, in turn, gives rise to use as functional setting the ultradifferentiable classes. As applications of such estimates we deduce uncertainty principles both of Donoho-Stark type and of local type for representations

Uncertainty principle, positivity and Lp-boundedness for generalized spectrograms

AbstractIn this paper we are concerned with the properties of positivity, uncertainty principle and continuity in Lp spaces of a generalized spectrogram. In particular we study the connections of a generalized spectrogram, as a subclass of the Cohen class, with the Rihaczek and the Wigner representations. We also consider the behavior of the generalized spectrogram with respect to the positivity and the Lp boundedness of the corresponding localization operators

V-084 * CERVICOSTERNOTOMY WITH THORACOTOMY FOR METASTATIC ADENOPATHY

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340-I * DIAPHRAGM SURGERY IN CHEST WALL NEOPLASMS

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F-036EPIDERMAL GROWTH FACTOR RECEPTOR MUTATIONS ARE LINKED TO SKIP N2 LYMPH NODE METASTASIS IN RESECTED NON-SMALL CELL LUNG CANCER ADENOCARCINOMAS

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