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https://open.uns.ac.rs/handle/123456789/14166
Назив: | Classes of degenerate elliptic operators in Gelfand–Shilov spaces | Аутори: | Gramchev T. Pilipović, Stevan Rodino L. |
Датум издавања: | 1-јан-2009 | Часопис: | Operator Theory: Advances and Applications | Сажетак: | © 2008 Birkhäuser Verlag Basel/Switzerland. We propose a novel approach for the study of the uniform regularity and the decay at infinity for Shubin type pseudo-differential operators which are globally hypoelliptic but not necessarily globally and even locally elliptic. The basic idea is to use the special role of the Hermite functions for the characterization of inductive and projective Gelfand–Shilov spaces. In this way we transform the problem to infinite dimensional linear systems on S Banach spaces of sequences by using Fourier series expansion with respect to the Hermite functions. As applications of our general results we obtain new theorems for global hypoellipticity for classes of degenerate operators in tensorized generalizations of Shubin spaces and in inductive and projective Gelfand–Shilov spaces. | URI: | https://open.uns.ac.rs/handle/123456789/14166 | ISBN: | 9783764389680 | ISSN: | 02550156 |
Налази се у колекцијама: | PMF Publikacije/Publications |
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