Buslaev, V. S.; Fedotov, A. A. The complex WKB method for Harper’s equation. I. (English. Russian original) Zbl 0839.34066 St. Petersbg. Math. J. 6, No. 3, 495-517 (1995); translation from Algebra Anal. 6, No. 3, 59-83 (1994). See the review in Zbl 0821.34062. Cited in 5 Documents MSC: 34E20 Singular perturbations, turning point theory, WKB methods for ordinary differential equations Keywords:spectral properties; Harper’s linear operator; complex WKB method Citations:Zbl 0821.34062 PDF BibTeX XML Cite \textit{V. S. Buslaev} and \textit{A. A. Fedotov}, St. Petersbg. Math. J. 6, No. 3, 59--83 (1994; Zbl 0839.34066); translation from Algebra Anal. 6, No. 3, 59--83 (1994) OpenURL