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Operator theory

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Operator theory

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Analytical spaces --- Differential equations --- Banach spaces. --- Semigroups. --- Operator theory. --- Banach spaces --- Semigroups --- Operator theory

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"The works of Jaak Peetre constitute the main body of this treatise. Important contributors are also J. L. Lions and A. P. Calderon, not to mention several others. We, the present authors, have thus merely compiled and explained the works of others (with the exception of a few minor contributions of our own). Let us mention the origin of this treatise. A couple of years ago, J. Peetre suggested to the second author, J. Lofstrom, writing a book on interpolation theory and he most generously put at Lofstrom's disposal an unfinished manu­ script, covering parts of Chapter 1-3 and 5 of this book. Subsequently, LOfstrom prepared a first rough, but relatively complete manuscript of lecture notes. This was then partly rewritten and thouroughly revised by the first author, J. Bergh, who also prepared the notes and comment and most of the exercises. Throughout the work, we have had the good fortune of enjoying Jaak Peetre's kind patronage and invaluable counsel. We want to express our deep gratitude to him. Thanks are also due to our colleagues for their support and help. Finally, we are sincerely grateful to Boe1 Engebrand, Lena Mattsson and Birgit Hoglund for their expert typing of our manuscript." [Publisher]

Interpolation spaces --- Espaces d'interpolation --- 517.98 --- Spaces, Interpolation --- Function spaces --- Functional analysis and operator theory --- Interpolation spaces. --- 517.98 Functional analysis and operator theory --- Espaces d'interpolation.

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Some of the results on automatic continuity of intertwining operators and homomorphisms that were obtained between 1960 and 1973 are here collected together to provide a detailed discussion of the subject. The book will be appreciated by graduate students of functional analysis who already have a good foundation in this and in the theory of Banach algebras.

Linear operators. --- Continuity. --- Continuum --- Mathematics --- Indivisibles (Philosophy) --- Linear maps --- Maps, Linear --- Operators, Linear --- Operator theory --- Philosophy