Recent results on thin domain problems II
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Thin domains, curved squeezing, evolution equations, inertial manifoldsAbstrakt
In this paper we survey some recent results on parabolic equations on curved squeezed domains. More specifically, consider the family of semilinear Neumann boundary value problems $$ \alignedat2 u_t &= \Delta u + f(u), &\quad&t> 0,\ x\in \Omega_\varepsilon, \\ \partial_{\nu_\varepsilon}u&= 0, &\quad& t> 0,\ x\in \partial \Omega_\varepsilon \endaligned \leqno{(\text{\rm E}_\varepsilon)} $$ where, for $\varepsilon> 0$ small, the set $\Omega_\varepsilon$ is a thin domain in $\mathbb R^\ell$, possibly with holes, which collapses, as $\varepsilon\to0^+$, onto a (curved) $k$-dimensional submanifold $\mathcal M$ of $\mathbb R^\ell$. If $f$ is dissipative, then equation (E$_\varepsilon$) has a global attractor ${\mathcal A}_\varepsilon$. We identify a ``limit'' equation for the family (E$_\varepsilon$), establish an upper semicontinuity result for the family ${\mathcal A}_\varepsilon$ and prove an inertial manifold theorem in case $\mathcal M$ is a $k$-sphere.Pobrania
Opublikowane
2002-06-01
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PRIZZI, Martino & RYBAKOWSKI, Krzysztof P. Recent results on thin domain problems II. Topological Methods in Nonlinear Analysis [online]. 1 czerwiec 2002, T. 19, nr 2, s. 199–219. [udostępniono 22.7.2024].
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