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Cosmological status of Lagrangian theory of density perturbations
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astro-ph
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bardeencosmologicalperturbationstheoryapproacheschibisovdensityequivalent
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We show that hydrodynamical and field approaches in theory of cosmological scalar perturbations are equivalent for a single medium. We also give relations between notations introduced by V. Lukash, J. Bardeen, J. Bardeen et al. and G. Chibisov and V. Mukhanov.
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