Comportamento assintótico para soluções de certas equações diferenciais funcionais periódicas / Asymptotic behavior of solutions to certain periodic functional differential equations

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

We are interested in the study of the asymptotic behavior of the solutions of a class of linear autonomous Functional Differential Equations (FDE) of neutral type, where the coeficients of the non neutral part are periodic functions with common period w and the time delays are multiples of w. We employ the spectral theory for linear operators applied to the so called monodromic operator PI: C ARROW! C, whose action is to evolve a given state one step of size w. We compute the resolvent of this operator, from where we infer the spectral properties that allows us to determine the asymptotic behavior of the solutions. We show the importance to determine whether an eigenvalue is dominant, in order to obtain the estimates for the correspondet solution, and we show results in this direction. Finally we study in detail three examples that illustrate the theory and demonstrate its applicability

ASSUNTO(S)

periodic equations teoria espectral dominance of eigenvalues spectral theory equações diferenciais funcionais periódicas functional differential equations asymptotic behavior comportamento assintótico dominância de autovalores

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