Geodesic
A sufficient condition for the continuity of the spectrum of a discrete Schr\"odinger operator
Funkcionalʹnyj analiz i ego priloženiâ, Tome 20 (1986) no. 4, pp. 70-71.

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     author = {A. Ya. Gordon},
     title = {A sufficient condition for the continuity of the spectrum of a discrete {Schr\"odinger} operator},
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A. Ya. Gordon. A sufficient condition for the continuity of the spectrum of a discrete Schr\"odinger operator. Funkcionalʹnyj analiz i ego priloženiâ, Tome 20 (1986) no. 4, pp. 70-71. http://geodesic.mathdoc.fr/item/FAA_1986_20_4_a9/

[1] Gordon A.Ya., UMN, 31:4 (1976), 257–258 | MR | Zbl

[2] Avron J., Simon B., Bull. Amer. Math. Soc., 6:1 (1982), 81–85 | DOI | MR | Zbl