Hardy Operators, Function Spaces and Embeddings

By: David E. Edmunds, W. Desmond Evans

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Paperback | 22 September 2011

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344 Pages

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22.86 x 15.88 x 1.91

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Classical Sobolev spaces, based on Lebesgue spaces on an underlying domain with smooth boundary, are not only of considerable intrinsic interest but have for many years proved to be indispensible in the study of partial differential equations and variational problems. Many developments of the basic theory since its inception arise in response to concrete problems, for example, with the (ubiquitous) sets with fractal boundaries.

The theory will probably enjoy substantial further growth, but even now a connected account of the mature parts of it makes a useful addition to the literature. Accordingly, the main themes of this book are Banach spaces and spaces of Sobolev type based on them; integral operators of Hardy type on intervals and on trees; and the distribution of the approximation numbers (singular numbers in the Hilbert space case) of embeddings of Sobolev spaces based on generalised ridged domains.

This timely book will be of interest to all those concerned with the partial differential equations and their ramifications. A prerequisite for reading it is a good graduate course in real analysis.

Industry Reviews

From the reviews:

"This interesting monograph is the second joint book by the two authors. Whereas in their first one ... one of the main objects was the study of spectral theory of boundary value problems for elliptic differential operators, the concentration is now more on the function space side ... . surely reflects the current state of research in the above-described field. It makes a useful addition to the corresponding literature and will be of great help for those working in this field already ... ." (Dorothee D. Haroske, Mathematical Reviews, 2005g)

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