Semiclassical approximation for the non-self-adjoint Sturm-Liouville problem with the potential \(q(x) = x^{4} - a^{2}x^{2}\)

DOI10.1134/S0001434609050174zbMath1181.34093OpenAlexW2032222258MaRDI QIDQ1033992

V. I. Pokotilo

Publication date: 10 November 2009

Published in: Mathematical Notes (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1134/s0001434609050174

zbMATH Keywords

semiclassical approximationSturm-Liouville problemdifferential operatordiscrete spectrumStokes graph

Mathematics Subject Classification ID

Particular ordinary differential operators (Dirac, one-dimensional Schrödinger, etc.) (34L40) Eigenvalues, estimation of eigenvalues, upper and lower bounds of ordinary differential operators (34L15)

Cites Work

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