Geodesic
On infinity of the discrete spectrum of operators in the Friedrichs model
Matematičeskie trudy, Tome 14 (2011) no. 1, pp. 195-211

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The discrete spectrumof selfadjoint operators in the Friedrichs model is studied. Necessary and sufficient conditions of existence of infinitely many eigenvalues in the Friedrichs model are presented. A discrete spectrum of a model three-particle discrete Schrödinger operator is described. 
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     author = {Yu. Kh. Eshkabilov},
     title = {On infinity of the discrete spectrum of operators in the {Friedrichs} model},
     journal = {Matemati\v{c}eskie trudy},
     pages = {195--211},
     publisher = {mathdoc},
     volume = {14},
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     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2011_14_1_a7/}
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Yu. Kh. Eshkabilov. On infinity of the discrete spectrum of operators in the Friedrichs model. Matematičeskie trudy, Tome 14 (2011) no. 1, pp. 195-211. http://geodesic.mathdoc.fr/item/MT_2011_14_1_a7/