In this thesis, we present an analysis of two cosmological models.
We begin by determining the asymptotics for solutions to Einstein's equation in
an isotropic, homogeneous and at spacetime under weak assumptions on the
behaviour of matter. Then, we examine how two dierent matter models aect
the asymptotics. One matter model considers dust and radiation as perfect
uids, and the other involves Vlasov matter. Finally, we consider the dierences
and similarities of the resulting asymptotics.
We conclude by discussing some physical consequences of the results.
The thesis also contains supplementary chapters for readers not familiar working
with asymptotics of solutions to ordinary dierential equations.
2012. , 65 p.