par Duerinckx, Guido G.
Référence Journal of Physics A: Mathematical and General, 16, 9, page (L289-L293), 002
Publication Publié, 1983
Article révisé par les pairs
Résumé : Considers the N-points Friedrichs (N>1) model (1948) and shows, by means of a counterexample, that a theorem of Marchand (1967) about the non-existence of point eigenvalues embedded in the continuous spectrum is incorrect.