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Singular perturbation for the weakly nonlinear reaction diffusion equation with boundary perturbation

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Abstract

In this paper, a class of nonlinear singularly perturbed initial boundary value problems for reaction diffusion equations with boundary perturbation are considered under suitable conditions. Firstly, by dint of the regular perturbation method, the outer solution of the original problem is obtained. Secondly, by using the stretched variable and the expansion theory of power series the initial layer of the solution is constructed. And then, by using the theory of differential inequalities, the asymptotic behavior of the solution for the initial boundary value problems is studied. Finally, using some relational inequalities the existence and uniqueness of solution for the original problem and the uniformly valid asymptotic estimation are discussed.

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Correspondence to Jia-qi Mo  (莫嘉琪).

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Communicated by ZHANG Hong-qing

Project supported by the National Natural Science Foundation of China (Nos. 40676016, 10471039), the National Key Basic Research Special Foundation of China (No. 2004CB418304), the Key Basic Research Foundation of the Chinese Academy of Sciences (No. KZCX3-SW-221) and in part by EInstitutes of Shanghai Municipal Education Commission (No. E03004)

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Mo, Jq. Singular perturbation for the weakly nonlinear reaction diffusion equation with boundary perturbation. Appl. Math. Mech.-Engl. Ed. 29, 1105–1110 (2008). https://doi.org/10.1007/s10483-008-0814-x

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  • DOI: https://doi.org/10.1007/s10483-008-0814-x

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Chinese Library Classification

2000 Mathematics Subject Classification

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