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Scattered plane waves, spectral asymptotics and trace formulas in exterior problems. (English. Russian original) Zbl 0224.47023
Sov. Math., Dokl. 12, 591-595 (1971); translation from Dokl. Akad. Nauk SSSR 197, 999-1002 (1971).

MSC:
47F05 General theory of partial differential operators (should also be assigned at least one other classification number in Section 47-XX)
47A40 Scattering theory of linear operators
35P25 Scattering theory for PDEs
47A13 Several-variable operator theory (spectral, Fredholm, etc.)
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