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ON A NONLINEAR BOUNDARY VALUE PROBLEM WITH A MIXED BOUNDARY CONDITION: ASYMPTOTIC BEHAVIOR OF A SOLUTION

Bui Tien Dung 1
Tran Minh Thuyet 2
Volume & Issue: Vol. 3 No. 9&10 (2000) | Page No.: 24-33 | DOI: 10.32508/stdj.v3i9&10.3593
Published: 2000-10-31

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Copyright The Author(s) 2023. This article is published with open access by Vietnam National University, Ho Chi Minh city, Vietnam. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0) which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. 

Abstract

We study the following nonlinear boundary value problem (-1)/x^y d/dx (x^y.|u^,(x)|^(p-2) u^,(x))+f(x,u(x))=F(x),0<x<1, (1) |lim┬(x→0_+ )⁡〖x^γ⁄p_(u^,(x)) 〗 | < +∞ ,|u^,(1)|^(p-2) u^,(1)+h.u(1)=g (2) where  > 0, p  2, h > 0, g are given constants, f, F are given functions. In this paper, we use the Galerkin and compactness method in appropriate Sobolev spaces with weight to prove the existence of a unique weak solution of the problem (1),(2). Afterwards, we also study the asymptotic behavior of the solution uh depending on h as h→0+. We also obtain that the function h  |u_h (1)| is nonincreasing on (0, +∞).

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