Geodesic
On a class of model systems that admit a lowering of powers in the Hamiltonian in the thermodynamic limit. II
Teoretičeskaâ i matematičeskaâ fizika, Tome 37 (1978) no. 2, pp. 246-257 Cet article a éte moissonné depuis la source Math-Net.Ru

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A class of model systems is considered in which particles interact only if they have definite momenta $p_i$ and not all the $p_i$ allowed by the conservation laws. It is shown that the equilibrium correlation functions and the reduced density matrices of the model systems and systems with approximating Hamiltonian are equal in the thermodynamic limit. 
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     author = {N. N. Bogolyubov (Jr.) and D. Ya. Petrina},
     title = {On~a~class of model systems that admit a~lowering of powers in the {Hamiltonian} in the thermodynamic {limit.~II}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {246--257},
     year = {1978},
     volume = {37},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1978_37_2_a8/}
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N. N. Bogolyubov (Jr.); D. Ya. Petrina. On a class of model systems that admit a lowering of powers in the Hamiltonian in the thermodynamic limit. II. Teoretičeskaâ i matematičeskaâ fizika, Tome 37 (1978) no. 2, pp. 246-257. http://geodesic.mathdoc.fr/item/TMF_1978_37_2_a8/

[1] N. N. Bogolyubov (ml.), D. Ya. Petrina, TMF, 33 (1977), 231

[2] J. Ginibre, J. Math. Phys., 6 (1965), 238 | DOI | MR | Zbl

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[6] N. N. Bogolyubov (ml.), TMF, 5 (1970), 136

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[8] N. N. Bogolyubov, Preprint OIYaI-511, Dubna, 1960