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Birkhäuser - Birkhäuser Mathematics - Scuola Normale Superiore | Para-Differential Calculus and Applications to the Cauchy Problem for Nonlinear Systems

Para-Differential Calculus and Applications to the Cauchy Problem for Nonlinear Systems

Métivier, Guy


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  • About this textbook

  • Presents a comprehensive exposition of the para-differential calculus for beginners
  • Provides a continuous exposition of the symmetrizer method from the constant coefficient equation to the variable coefficient case
  • Details the application to systems of Schrödinger equations

The main aim is to present at the level of beginners several modern tools of micro-local analysis which are useful for the mathematical study of nonlinear partial differential equations. The core of these notes is devoted to a presentation of the para-differential techniques, which combine a linearization procedure for nonlinear equations, and a symbolic calculus which mimics or extends the classical calculus of Fourier multipliers. These methods apply to many problems in nonlinear PDE’s such as elliptic equations, propagation of singularities, boundary value problems, shocks or boundary layers. However, in these introductory notes, we have chosen to illustrate the theory on two selected and relatively simple examples, which allow becoming familiar with the techniques. They concern the well posed-ness of the Cauchy problem for systems of nonlinear PDE's, firstly hyperbolic systems and secondly coupled systems of Schrödinger equations which arise in various models of wave propagation.

Content Level » Graduate

Related subjects » Scuola Normale Superiore

Table of contents 

I. Introduction to Systems - 1. Notations and Examples - 2. Constant Coefficient Systems. Fourier Synthesis - 3. The Method of Symmetrizers.- II. The Para-Differential Calculus - 1. Pseudo-Differential Operators 2. Para-Differential Operators - 3. Symbolic Calculus.-III. Applications - 1. Nonlinear Hyperbolic systems - 2. Systems of Schrödinger Equations.

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