The phase-integral method in a problem of singular perturbation theory

DOI10.1070/IM8542zbMath1367.34106MaRDI QIDQ5272588

V. V. Fufaev, S. A. Stepin

Publication date: 30 June 2017

Published in: Izvestiya: Mathematics (Search for Journal in Brave)

zbMATH Keywords

phase integralWKB-approximationquasiclassical asymptoticsBohr-Sommerfeld-Maslov quantization rule

Mathematics Subject Classification ID

Asymptotic approximations, asymptotic expansions (steepest descent, etc.) (41A60) Singular perturbations, turning point theory, WKB methods for ordinary differential equations (34E20) Asymptotic distribution of eigenvalues, asymptotic theory of eigenfunctions for ordinary differential operators (34L20) Singular perturbation problems for ordinary differential equations in the complex domain (complex WKB, turning points, steepest descent) (34M60)

Related Items (2)

Complex WKB method (one-dimensional linear problems on the complex plane) ⋮ WKB asymptotics and spectral deformation in semi-classical limit

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