The project continues the research of the applicant in last years and it is focused on topical problems in function spaces relevant for applications in differential equations. The major goals are: extrapolation properties of Lebesgue and Orlicz spaces, including their weighted clones, differentiability properties of operators in them, associated extrapolation behaviour of traces of functions in Sobolev spaces, imbedding properties of anisotropic spaces of Sobolev type via real and Fourier analysis techniques with emphasis on spaces with dominating mixed smoothness.
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