caa a22 4500 445387416 CHVBK 20180317143036.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10714-010-1113-2 doi (NATIONALLICENCE)springer-10.1007/s10714-010-1113-2 Koshelev N. Ulyanovsk State University, Leo Tolstoy str 42, 432970, Ulyanovsk, Russia aut On the growth of perturbations in interacting dark energy and dark matter fluids [Elektronische Daten] [N. Koshelev] The covariant generalizations of the background dark sector coupling suggested in Mangano, Miele and Pettorino (Mod Phys Lett A 18:831, 2003) are considered. The evolution of perturbations is studied with detailed attention to interaction rate that is proportional to the product of dark matter and dark energy densities. It is shown that some classes of models with coupling of this type do not suffer from early time instabilities in strong coupling regime. Springer Science+Business Media, LLC, 2010 Cosmology nationallicence General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/5(2011-05-01), 1309-1321 0001-7701 43:5<1309 2011 43 10714 https://doi.org/10.1007/s10714-010-1113-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10714-010-1113-2 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Koshelev N. Ulyanovsk State University, Leo Tolstoy str 42, 432970, Ulyanovsk, Russia aut NATIONALLICENCE 773 0- General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/5(2011-05-01), 1309-1321 0001-7701 43:5<1309 2011 43 10714 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer