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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.

MSC:

34E20 Singular perturbations, turning point theory, WKB methods for ordinary differential equations

Citations:

Zbl 0821.34062
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