On the solvability of pseudodifferential operators
Nils Dencker (2005-2006)
Séminaire Équations aux dérivées partielles
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Nils Dencker (2005-2006)
Séminaire Équations aux dérivées partielles
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Zasorin, Yuriy Valentinovich (2001)
Abstract and Applied Analysis
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Triebel, Hans
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Maciej Zworski (2004-2005)
Séminaire Équations aux dérivées partielles
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Popescu, Emil (2003)
Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică
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Morando, Alessandro, Secchi, Paolo (2010)
International Journal of Differential Equations
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Messina, F. (2003)
Rendiconti del Seminario Matematico
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Giorgio Metafune, Diego Pallara (2000)
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni
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We give sufficient conditions for the discreteness of the spectrum of differential operators of the form in where and for Schrödinger operators in . Our conditions are also necessary in the case of polynomial coefficients.