Partial Differential Equations. Vol.4 Microlocal Analysis and Hyperbolic Equations (Encyclopaedia of Mathematical Sciences Vol.33) (1993. 241 p. 24,5 cm)

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Beide Teile dieses EMS-Bandes behandeln aktuelle Forschungsthemen im Gebiet der partiellen Differentialgleichungen. Die mikrolokale Analysis hat sich zu einer wichtigen Methode entwickelt, auf der viele Fortschritte in der Theorie der Hamiltonschen Systeme beruhen. Ein weiteres wichtiges Gebiet ist die Theorie der hyperbolischen Operatoren und das Cauchysche Anfangswertproblem. Die beiden Autoren Egorov und Ivrii geben einen Überblick über den Stand der Forschung bis hin zu ungelösten Problemen. Das Buch ist eine wertvolle Informationsquelle für Forscher und Studenten höherer Semester im Gebiet der partiellen Differentialgleichungen und der theoretischen Physik. In the first part of this EMS volume Yu.V. Egorov gives an account of microlocal analysis as a tool for investigating partial differential equations. This method has become increasingly important in the theory of Hamiltonian systems. Egorov discusses the evolution of singularities of a partial differential equation and covers topics like integral curves of Hamiltonian systems, pseudodifferential equations and canonical transformations, subelliptic operators and Poisson brackets. The second survey written by V.Ya. Ivrii treats linear hyperbolic equations and systems. The author states necessary and sufficient conditions for C?- and L2 -well-posedness and he studies the analogous problem in the context of Gevrey classes. He also gives the latest results in the theory of mixed problems for hyperbolic operators and a list of unsolved problems. Both parts cover recent research in an important field, which before was scattered in numerous journals. The book will hence be of immense value to graduate students and researchers in partial differential equations and theoretical physics. I. Microlocal Analysis.- II. Linear Hyperbolic Equations.- Author Index.

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