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dc.contributor.authorUllrich, Paul Aaron 17:42:55 (GMT) 17:42:55 (GMT)
dc.description.abstractIn this thesis we first apply the 1+3 covariant description of general relativity to analyze n-fluid Friedmann-Lemaitre (FL) cosmologies; that is, homogeneous and isotropic cosmologies whose matter-energy content consists of n non-interacting fluids. We are motivated to study FL models of this type as observations suggest the physical universe is closely described by a FL model with a matter content consisting of radiation, dust and a cosmological constant. Secondly, we use the 1+3 covariant description to analyse scalar, vector and tensor perturbations of FL cosmologies containing a perfect fluid and a cosmological constant. In particular, we provide a thorough discussion of the behaviour of perturbations in the physically interesting cases of a dust or radiation background.en
dc.format.extent906850 bytes
dc.publisherUniversity of Waterlooen
dc.subjectgeneral relativityen
dc.titleExact and Perturbed Friedmann-Lemaitre Cosmologiesen
dc.typeMaster Thesisen
dc.subject.programApplied Mathematicsen Mathematicsen
uws-etd.degreeMaster of Mathematicsen

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