This textbook is a completely revised, updated, and expanded English edition of the important Analyse fonctionnelle (1983). In addition, it contains a wealth of

The theory of elliptic boundary problems is fundamental in analysis and the role of spaces of weakly differentiable functions (also called Sobolev spaces) is es

This book is about differentiation of functions. It is divided into two parts, which can be used as different textbooks, one for an advanced undergraduate cours

This textbook is addressed to graduate students in mathematics or other disciplines who wish to understand the essential concepts of functional analysis and the

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