Geodesic
Resonances of the scattering matrix and quasilevels
Teoretičeskaâ i matematičeskaâ fizika, Tome 106 (1996) no. 1, pp. 16-23 
A. A. Arsen'ev. Resonances of the scattering matrix and quasilevels. Teoretičeskaâ i matematičeskaâ fizika, Tome 106 (1996) no. 1, pp. 16-23. http://geodesic.mathdoc.fr/item/TMF_1996_106_1_a1/
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     title = {Resonances of the scattering matrix and quasilevels},
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Voir la notice de l'article provenant de la source Math-Net.Ru

The connection between resonances of the scattering matrix and quasilevels in the abstract theory of scattering is analized.

[1] Kato T., Teoriya vozmuschenii i lineinye operatory, Mir, M., 1972 | Zbl

[2] Birman M. Sh., Entina S. B., Izv. AN SSSR, ser. matem., 31 (1967), 401–430 | MR | Zbl