The rotation number for almost periodic potentials. (English) Zbl 0497.35026

Commun. Math. Phys. 84, 403-438 (1982); erratum ibid. 90, 317-318 (1983).


35J10 Schrödinger operator, Schrödinger equation
34L99 Ordinary differential operators
81Q99 General mathematical topics and methods in quantum theory
35Q99 Partial differential equations of mathematical physics and other areas of application
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