Geodesic
Generalized wave operators
Sbornik. Mathematics, Tome 10 (1970) no. 2, pp. 197-216 
L. A. Sakhnovich. Generalized wave operators. Sbornik. Mathematics, Tome 10 (1970) no. 2, pp. 197-216. http://geodesic.mathdoc.fr/item/SM_1970_10_2_a4/
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     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1970_10_2_a4/}
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In this paper we generalize the concepts of wave operators and scattering operators. We find sufficient conditions for the existence of generalized wave operators for the Friedrichs model with discontinuous kernel, and for differential operators with potential of Coulomb type. Bibliography: 16 titles.

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