ASYMPTOTIC PROPERTIES FOR A SEMILINEAR PLATE EQUATION IN UNBOUNDED DOMAINS

Author:

DA LUZ CLEVERSON ROBERTO1,CHARÃO RUY COIMBRA2

Affiliation:

1. Institute of Mathematics, Federal University of Rio de Janeiro, Cidade Universitária, Campus do Fundão, 21945-970 Rio de Janeiro RJ, Brazil

2. Department of Mathematics, Federal University of Santa Catarina, Campus Universitário, Trindade, 88040-900 Florianópolis SC, Brazil

Abstract

We study the existence, uniqueness, and asymptotic properties of global solutions to the initial value problem associated with a semilinear, dissipative, plate equation under rotational inertia effects in ℝn. We obtain polynomial decay rate in time for the total energy. In dimension n ≥ 5 for the linear problem and n = 5 for the semilinear problem with small data, we obtain fast decay of the total energy and a decay rate t-1/2 for L2-norm of the solution and similar decay rates for the L2-norm of higher-order derivatives.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Mathematics,Analysis

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