Carvalho, Alexandre Nolasco deCruz, German Jesus Lozada [UNESP]2014-05-202014-05-202007-01-15Journal of Mathematical Analysis and Applications. San Diego: Academic Press Inc. Elsevier B.V., v. 325, n. 2, p. 1216-1239, 2007.0022-247Xhttp://hdl.handle.net/11449/32922We obtain existence of asymptotically stable nonconstant equilibrium solutions for semilinear parabolic equations with nonlinear boundary conditions on small domains connected by thin channels. We prove the convergence of eigenvalues and eigenfunctions of the Laplace operator in such domains. This information is used to show that the asymptotic dynamics of the heat equation in this domain is equivalent to the asymptotic dynamics of a system of two ordinary differential equations diffusively (weakly) coupled. The main tools employed are the invariant manifold theory and a uniform trace theorem. (c) 2006 Elsevier B.V. All rights reserved.1216-1239engSemilinear parabolic problemsNonlinear boundary conditionsDumbbell domainsStable nonconstant equilibriaInvariant manifoldsArtigo10.1016/j.jmaa.2006.02.046WOS:000242730600032Acesso abertoWOS000242730600032.pdf9125376680065204