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International Journal of Mathematics and Mathematical Sciences
Article . 2012 . Peer-reviewed
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Pullback Attractors for Nonclassical Diffusion Equations in Noncylindrical Domains

عوامل جذب السحب لمعادلات الانتشار غير الكلاسيكية في المجالات غير الأسطوانية
Authors: Cung The Anh; Nguyen Duong Toan;

Pullback Attractors for Nonclassical Diffusion Equations in Noncylindrical Domains

Abstract

The existence and uniqueness of a variational solution are proved for the following nonautonomous nonclassical diffusion equation 𝑢 𝑡 − 𝜀 Δ 𝑢 𝑡 − Δ 𝑢 + 𝑓 ( 𝑢 ) = 𝑔 ( 𝑥 , 𝑡 ) , 𝜀 ∈ ( 0 , 1 ] , in a noncylindrical domain with homogeneous Dirichlet boundary conditions, under the assumption that the spatial domains are bounded and increase with time. Moreover, the nonautonomous dynamical system generated by this class of solutions is shown to have a pullback attractor  𝒜 𝜀 , which is upper semicontinuous at 𝜀 = 0 .

L'existence et l'unicité d'une solution variationnelle sont prouvées pour l' équation de diffusion non-classique non-autonome suivante , dans un domaine non cylindrique avec des conditions limites de Dirichlet homogènes, dans l'hypothèse où les domaines spatiaux sont bornés et augmentent avec le temps. De plus, il est démontré que le système dynamique non autonome généré par cette classe de solutions a un attracteur de recul, qui est semi-continu supérieur à 0 .

La existencia y la singularidad de una solución variacional se prueban para la siguiente ecuación de difusión no clásica no autónoma , en un dominio no cilíndrico con condiciones de contorno de Dirichlet homogéneas, bajo el supuesto de que los dominios espaciales están delimitados y aumentan con el tiempo. Además, se muestra que el sistema dinámico no autónomo generado por esta clase de soluciones tiene un atractor de retroceso, que es semicontinuo superior en 0 .

تم إثبات وجود وتفرد حل تبادلي لمعادلة الانتشار غير الكلاسيكية غير المستقلة التالية ، على افتراض أن النطاقات المكانية محدودة وتزداد مع مرور الوقت. علاوة على ذلك، يظهر النظام الديناميكي غير المستقل الذي تم إنشاؤه بواسطة هذه الفئة من الحلول أنه يحتوي على جاذب سحب، وهو شبه مستمر علوي عند = 0 .

Keywords

Composite material, pseudoparabolic equation, Artificial intelligence, History, Wave Equations, Inverse Problems in Mathematical Physics and Imaging, Inverse Scattering Theory, Inverse Problems, Matrix (chemical analysis), homogeneous Dirichlet boundary conditions, Font, Mathematical analysis, Engineering, Style (visual arts), Transmission Eigenvalues, QA1-939, FOS: Mathematics, Attractors, Multiscale Methods for Heterogeneous Systems, Mathematical Physics, upper semicontinuous dependence, Computer science, Materials science, Reaction-diffusion equations, Computational Theory and Mathematics, Archaeology, Control and Systems Engineering, Combinatorics, Physical Sciences, Computer Science, Analysis and Control of Distributed Parameter Systems, Uniqueness, Ultraparabolic equations, pseudoparabolic equations, etc., Stability, Mathematics

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
8
Top 10%
Average
Average
gold