On the Equality of Resonances (Poles of the Scattering Amplitude) and Virtual Poles

DOI10.1002/MANA.19780860116zbMath0451.47009OpenAlexW2119121161MaRDI QIDQ3897522

Michael Demuth, Hellmut Baumgärtel, Manfred Wollenberg

Publication date: 1978

Published in: Mathematische Nachrichten (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1002/mana.19780860116

zbMATH Keywords

scattering amplitudeunstable eigenvaluesvirtual poles

Mathematics Subject Classification ID

Perturbation theory of linear operators (47A55) Scattering theory of linear operators (47A40)

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