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On the one-dimensional Schrödinger equation with a quasi-periodic potential. (English) Zbl 0477.34007
Nonlinear dynamics, int. Conf., New York 1979, Ann. N.Y. Acad. Sci. 357, 90-107 (1980).

MSC:
34A30 Linear ordinary differential equations and systems, general
34B30 Special ordinary differential equations (Mathieu, Hill, Bessel, etc.)
34C27 Almost and pseudo-almost periodic solutions to ordinary differential equations