Operators of Hardy type

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摘要

We provide a survey of the contributors of Des Evans dealing with operators T of the form TF(x)=v(x)∫axu(t)f(t)dt acting between Lehesgue spaces, and also report on new results concerning the Bernstein widths and Kolmogorov numbers of T.

论文关键词：47G10,47B10,Approximation numbers,Bernstein and Kolmogorov widths,Weighted Hardy-type operators, pq-Laplacian

论文评审过程：Received 7 June 2005, Available online 4 December 2006.

论文官网地址：https://doi.org/10.1016/j.cam.2006.10.034