Geodesic
Variational determination of multi-time Green's functions for degenerate Boze-systems and common structure of their hydrodynamical asymptotics
Teoretičeskaâ i matematičeskaâ fizika, Tome 108 (1996) no. 3, pp. 469-481

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Variational determination of $n$-time ($n=2,3,\dots$) Green's functions for degenerate boze-systems is given. Basing on Bogolubov's ideas about reduction in the description of nonequilibrium states the mathymatical method for studing hydrodynamical asymptotics of multi-time Green's functions is developed. The resonance excitement diagrams of the first sound are investigated. 
@article{TMF_1996_108_3_a9,
     author = {S. V. Peletminskii and V. P. Skripnik and V. S. Shchelokov},
     title = {Variational determination of multi-time {Green's} functions for degenerate {Boze-systems} and common structure of their hydrodynamical asymptotics},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {469--481},
     publisher = {mathdoc},
     volume = {108},
     number = {3},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1996_108_3_a9/}
}
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S. V. Peletminskii; V. P. Skripnik; V. S. Shchelokov. Variational determination of multi-time Green's functions for degenerate Boze-systems and common structure of their hydrodynamical asymptotics. Teoretičeskaâ i matematičeskaâ fizika, Tome 108 (1996) no. 3, pp. 469-481. http://geodesic.mathdoc.fr/item/TMF_1996_108_3_a9/