Notes about s‐numbers for a Sobolev type embedding of order 4 and for a higher order integral operator

Petr Gurka and Jan Lang

Mathematische Nachrichten, 2021, vol. 294, issue 4, 731-747

Abstract: The main focus of this paper is on study of s‐numbers for a higher order Sobolev embedding on an interval and also for the corresponding Hardy‐type operator. Upper and lower estimates for approximation and Bernstein numbers are described and their relations with results for lower order Sobolev embeddings are discussed.

Date: 2021
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https://doi.org/10.1002/mana.202000206

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