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Общемосковский постоянный научный семинар «Оптимизация и нелинейный анализ»
17 февраля 2022 г. 14:00–15:30, г. Москва, ИПУ РАН
 


Recent progress in studying boundedness of classical operators of real analysis in general Morrey-type spaces

В. И. Буренков

Российский университет дружбы народов, г. Москва

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Аннотация: The theory of boundedness of classical operators of real analysis, such as maximal operator, fractional maximal operator, Riesz potential, singular integral operator etc, from one weighted Lebesgue space to another one is by now well studied. For the overwhelming majority of the values of the numerical parameters necessary and sufficient conditions on the weight functions ensuring boundedness have been found. These results have good applications in the theory of partial differential equations. However, it should be noted that in the theory of partial differential equations, alongside with weighted Lebesgue spaces, general Morrey-type spaces also play an important role, but until recently there were no results, containing necessary and sufficient conditions on the weight functions ensuring boundedness of the aforementioned operators from one general Morrey-type space to another one. The case of power-type weights was well studied, but for general Morrey-type spaces only sufficient conditions were known. In the last decade necessary and sufficient conditions for the case of general Morrey-type spaces have been found, but for a comparatively restricted range of the numerical parameters. In this area there are many open questions. In the talk a survey of results, containing necessary and sufficient conditions for boundedness of main operators of real analysis, will be given, and open problems will be discussed in detail.
 
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