An International Virtual Workshop on “Recent Advancement in Astrophysics and Cosmology”, Jharkhand, Hindistan, 12 - 13 Ekim 2020, ss.3
Abstract:We investigate Friedmann-Lamaitre-Robertson-Walker (FLRW) models with a positive cosmological constant, using dynamical system methods. We assume a perfect-fluid matter source with p ( 1) as equation of state where is the matter- energy density, p is the pressure, and is a constant as well as draw the state spaces for different values of . We analyze the nature of the singularity at the beginning and the fate of the universe in the far future. In particular, we address the question whether there is a solution which is stable for all the cases.