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@article{MAN_1974__207_162536, author = {Barry Simon}, title = {Absence of {Positive} {Eigenvalues} in a {Class} of {Multiparticle} {Quantum} {Systems.}}, journal = {Mathematische Annalen}, pages = {133--138}, publisher = {mathdoc}, volume = {207}, year = {1974}, zbl = {0253.35025}, url = {http://geodesic.mathdoc.fr/item/MAN_1974__207_162536/} }
Barry Simon. Absence of Positive Eigenvalues in a Class of Multiparticle Quantum Systems.. Mathematische Annalen, Tome 207 (1974), pp. 133-138. http://geodesic.mathdoc.fr/item/MAN_1974__207_162536/