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.
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