Geodesic
Kinetics of small perturbations in closed and open Friedmann cosmologies
Teoretičeskaâ i matematičeskaâ fizika, Tome 55 (1983) no. 2, pp. 224-235

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The behavior of small gravitational perturbations in closed and open Friedmann cosmologies filled with a collisionless gas (neutrinos) is investigated. Operator methods are used to solve the problem. The asymptotic behavior of perturbations during the nonrelativistic stage of expansion of the Universe is obtained. 
@article{TMF_1983_55_2_a6,
     author = {A. V. Zakharov},
     title = {Kinetics of small perturbations in closed and open {Friedmann} cosmologies},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {224--235},
     publisher = {mathdoc},
     volume = {55},
     number = {2},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1983_55_2_a6/}
}
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A. V. Zakharov. Kinetics of small perturbations in closed and open Friedmann cosmologies. Teoretičeskaâ i matematičeskaâ fizika, Tome 55 (1983) no. 2, pp. 224-235. http://geodesic.mathdoc.fr/item/TMF_1983_55_2_a6/