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Bounded sequence of symbol classes of pseudodifferential operatorKeywords: Pseudodifferential operators , exotic sequence of symbol classes , Wigner distribution , Gabor frame , short-time Fourier transform , spectral invariance , almost diagonalization , modulation space , Wiener's lemma Abstract: We investigate the properties of an exotic sequence of symbol classes ofpseudodifferential operators. A sequence of Sjostrand's classes will be discussin methods of time-frequency analysis .The time frequency leads to simpleSjostrand's fundamental results of modifying generalizations.
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