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Doctoral Thesis
DOI
https://doi.org/10.11606/T.55.2020.tde-31082020-092702
Document
Author
Full name
Eduardo Henrique Gomes Tavares
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2020
Supervisor
Committee
Fu, Ma To (President)
Bonotto, Everaldo de Mello
Miyagaki, Olimpio Hiroshi
Planas, Gabriela Del Valle
Title in English
Pullback dynamics of nonautonomous supercritical wave equations on compact Riemannian manifolds
Keywords in English
Continuity of attractors
Pullback exponential attractor
Supercritical wave equation
Abstract in English
This thesis is concerned with large-time dynamics of non-autonomous wave equations defined on compact Riemannian manifolds with boundary. It contains three main contributions. First, we give a detailed proof of well-posedness for the wave equation with supercritical nonlinearities and time-dependent external forces, on the energy space. It is a slight generalization of known results for autonomous problems. However our arguments are different. Thus, the wave problem can be studied as a non-autonomous dynamical system since its finite energy solution flows define a continuous evolution process. Next, we establish the existence of pullback exponential attractors to this non-autonomous system, such that any section have finite fractal dimensions on the natural energy space. Finally, in the case of external force is dependent on a parameter, we study the continuity of pullback attractors with respect to it.
Title in Portuguese
Dinâmica pullback de equações da onda supercríticas em variedades Riemannianas compactas
Keywords in Portuguese
Atrator exponencial pullback
Continuidade de atratores
Equação da onda supercrítica
Abstract in Portuguese
A presente tese é dedicada ao estudo da dinâmica a longo-prazo de equações de ondas definidas em variedades Riemannianas compactas com bordo. Apresentamos três resultados principais. Primeiramente, estudamos a boa colocação do problema com não linearidades supercríticas e forças dependente do tempo. O resultado é uma extensão dos trabalhos anteriores para o caso autônomo. Entretanto a nossa abordagem é diferente. Assim, nosso problema gera um processo de evolução e pode ser estudado como um sistema dinâmico não autônomo. Em seguida, mostramos a existência de atratores pullback exponencial, o qual toda seção possui dimensão fractal finita no espaço de energia. Por fim, no caso em que a força externa depende de um parâmetro, estudamos a continuidade dos atratores em relação ao parâmetro.
 
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Publishing Date
2020-08-31
 
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