Functional Analysis
Michel Willem
Gebundenes Buch

Functional Analysis

Fundamentals and Applications

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This textbook presents the principles of functional analysis in a clear and concise way. The first three chapters describe the general notions of distance, integral, and norm, as well as their relations. Fundamental examples are provided in the three chapters that follow: Lebesgue spaces, dual spaces, and Sobolev spaces. Two subsequent chapters develop applications to capacity theory and elliptic problems. In particular, the isoperimetric inequality and the Pólya-Szegö and Faber-Krahn inequalities are proved by purely functional methods. The epilogue contains a sketch of the history of funct...