On the genericity of nonvanishing instability intervals in Hills equation
Barry Simon (1976)
Annales de l'I.H.P. Physique théorique
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Barry Simon (1976)
Annales de l'I.H.P. Physique théorique
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Min-Jei Huang (1989)
Annales de l'I.H.P. Physique théorique
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Volker Enss, Krešimir Veselić (1983)
Annales de l'I.H.P. Physique théorique
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James S. Howland (1998)
Annales de l'I.H.P. Physique théorique
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Tatiana Suslina (2000)
Journées équations aux dérivées partielles
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The lecture is devoted to the problem of absolute continuity of the spectrum of periodic operators. A general approach to this problem was suggested by L. Thomas in 1973 for the case of the Schrödinger operator with periodic electric potential. Further application of his method to concrete operators of mathematical physics met analytic difficulties. In recent years several new problems in this area have been solved. We propose a survey of known results in this area, including very recent,...