Massimiliano Berti; Jean-Marc Delort Almost Global Solutions of Capillary-Gravity Water Waves Equations on the Circle 9783319994857

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Автор: Massimiliano Berti; Jean-Marc Delort
Название: Almost Global Solutions of Capillary-Gravity Water Waves Equations on the Circle
ISBN: 9783319994857
Издательство: Springer
Классификация:

Основы высшей математики и математический анализ

Функциональный анализ и преобразования

Дифференциальное исчисление и дифференциальные уравнения

Прикладная математика

Теории нелинейных процессов

Распознавание образов

ISBN-10: 3319994859
Обложка/Формат: Soft cover
Страницы: 269
Вес: 0.43 кг.
Дата издания: 2018
Серия: Lecture Notes of the Unione Matematica Italiana
Язык: English
Издание: 1st ed. 2018
Иллюстрации: 3 illustrations, black and white; x, 269 p. 3 illus.
Размер: 234 x 156 x 15
Читательская аудитория: Professional & vocational
Основная тема: Mathematics
Ссылка на Издательство: Link
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Поставляется из: Германии
Описание: The goal of this monograph is to prove that any solution of the Cauchy problem for the capillary-gravity water waves equations, in one space dimension, with periodic, even in space, small and smooth enough initial data, is almost globally defined in time on Sobolev spaces, provided the gravity-capillarity parameters are taken outside an exceptional subset of zero measure. In contrast to the many results known for these equations on the real line, with decaying Cauchy data, one cannot make use of dispersive properties of the linear flow. Instead, a normal forms-based procedure is used, eliminating those contributions to the Sobolev energy that are of lower degree of homogeneity in the solution. Since the water waves equations form a quasi-linear system, the usual normal forms approaches would face the well-known problem of losses of derivatives in the unbounded transformations. To overcome this, after a paralinearization of the capillary-gravity water waves equations, we perform several paradifferential reductions to obtain a diagonal system with constant coefficient symbols, up to smoothing remainders. Then we start with a normal form procedure where the small divisors are compensated by the previous paradifferential regularization. The reversible structure of the water waves equations, and the fact that we seek solutions even in space, guarantees a key cancellation which prevents the growth of the Sobolev norms of the solutions.
Дополнительное описание: Introduction.- MainResult. - Paradifferential Calculus. - Complex Formulation of the Equation and Diagonalization of the Matrix Symbol. - Reduction to a Constant Coefficients Operator and Proof of the Main Theorem. - The Dirichlet–Neumann Paradifferential

Almost Global Solutions of Capillary-Gravity Water Waves Equations on the Circle, Massimiliano Berti; Jean-Marc Delort