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https://open.uns.ac.rs/handle/123456789/4808
Назив: | Beyond Gevrey regularity | Аутори: | Pilipović, Dragana Teofanov, Nenad Tomić, Filip |
Датум издавања: | 1-мар-2016 | Часопис: | Journal of Pseudo-Differential Operators and Applications | Сажетак: | © 2016, Springer International Publishing. We define and study classes of smooth functions which are less regular than Gevrey functions. To that end we introduce two-parameter dependent sequences which do not satisfy Komatsu’s condition (M.2)’, which implies stability under differential operators within the spaces of ultradifferentiable functions. Our classes therefore have particular behavior under the action of differentiable operators. On a more advanced level, we study microlocal properties and prove that WF0,∞(P(D)u)⊆WF0,∞(u)⊆WF0,∞(P(D)u)∪Char(P),where u is a Schwartz distribution, P(D) is a partial differential operator with constant coefficients and WF0,∞ is the wave front set described in terms of new regularity conditions. For the analysis we introduce particular admissibility condition for sequences of cut-off functions, and a new technical tool called enumeration. | URI: | https://open.uns.ac.rs/handle/123456789/4808 | ISSN: | 16629981 | DOI: | 10.1007/s11868-016-0145-0 |
Налази се у колекцијама: | PMF Publikacije/Publications |
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