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JOURNALS // Zhurnal Vychislitel'noi Matematiki i Matematicheskoi Fiziki // Archive

Zh. Vychisl. Mat. Mat. Fiz., 2008 Volume 48, Number 1, Pages 33–45 (Mi zvmmf193)

This article is cited in 1 paper

Asymptotics of a second-order differential equation with a small parameter in the case when the reduced equation has two solutions

S. F. Dolbeeva, E. A. Chizh

Chelyabinsk State University, ul. Brat'ev Kashirinykh 129, Chelyabinsk, 454021, Russia

Abstract: The boundary value problem for a second-order nonlinear ordinary differential equation with a small parameter multiplying the highest derivative is examined. It is assumed that the reduced equation has two solutions with intersecting graphs. Near the intersection point, the asymptotic behavior of the solution to the original problem is fairly complex. A uniform asymptotic approximation to the solution that is accurate up to any prescribed power of the small parameter is constructed and justified.

Key words: asymptotic expansion of a solution, differential equation with a small parameter, boundary value problem, matching of asymptotic expansions.

UDC: 519.624.2

Received: 02.07.2007


 English version:
Computational Mathematics and Mathematical Physics, 2008, 48:1, 30–42

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