Semi-bounded Differential Operators, Contractive Semigroups and Beyond (Operator Theory: Advances and Applications, 243)

Cialdea, Alberto; Maz'ya, Vladimir

ISBN 10: 3319045571 / ISBN 13: 9783319045573

Editore: Birkhäuser, 2014

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Dati bibliografici

• Titolo: Semi-bounded Differential Operators, Contractive Semigroups and Beyond (Operator Theory: Advances and Applications, 243)
• Editore: Birkhäuser
• Data di pubblicazione: 2014
• Lingua: Inglese
• ISBN 10: 3319045571
• ISBN 13: 9783319045573
• Rilegatura: Rilegato
• Condizione: nuovo

Descrizione articolo

Riassunto

In the present book the conditions are studied for the semi-boundedness of partial differential operators which is interpreted in different ways. Nowadays one knows rather much about L²-semibounded differential and pseudo-differential operators, although their complete characterization in analytic terms causes difficulties even for rather simple operators. Until recently almost nothing was known about analytic characterizations of semi-boundedness for differential operators in other Hilbert function spaces and in Banach function spaces. The goal of the present book is to partially fill this gap. Various types of semi-boundedness are considered and some relevant conditions which are either necessary and sufficient or best possible in a certain sense are given. Most of the results reported in this book are due to the authors.

Dalla quarta di copertina

This book examines the conditions for the semi-boundedness of partial differential operators, which are interpreted in different ways. For example, today we know a great deal about L2-semibounded differential and pseudodifferential operators, although their complete characterization in analytic terms still poses difficulties, even for fairly simple operators. In contrast, until recently almost nothing was known about analytic characterizations of semi-boundedness for differential operators in other Hilbert function spaces and in Banach function spaces. This book works to address that gap. As such, various types of semi-boundedness are considered and a number of relevant conditions which are either necessary and sufficient or best possible in a certain sense are presented. The majority of the results reported on are the authors own contributions.