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In this work we study the asymptotic nonlinear dynamical of s ome reaction-diffusion parabolic equations under perturbations in parameter and singular pertur ba ions in a dumbbell domain. More precisely, we treat of the attractors from these problems, we seek under stand the dependence these asymptotic set of states in relationship the parameter, investigating conti nuity with rate. The program that we will follow to prove the continuity of the attractors with rate well as the e ntir structure, we show that these semigroups possess strong exponential dissipative properties.

Taxa de convergência de atratores de algumas equações de reação-difusão perturbadas.