Essential spectrum of an $N$-particle additive cluster operator
Teoretičeskaâ i matematičeskaâ fizika, Tome 53 (1982) no. 2, pp. 216-226
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An $N$-particle additive cluster operator is considered. An analog of the Hunziger–van Winter–Zhislin theorem on the structure of the essential spectrum for fixed total momentum is proved for it.
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