Browsing by Author "Laatz, C D"

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    Cosmological perturbation theory and the variational principle in gravitation
    (2000) Laatz, C D; Ellis, GFR; Dunsby, P K S
    In this thesis firstly the theory of relativistic cosmological perturbations is studies, in the process being reviewed over the period 1960-1993. Secondly the variational principle, apropos of gravitation, is formulated and discussed. These two fields are then synthesised via a variational formulation of general relativity and cosmological perturbation theory. In the process new light is shed on Covariant Perturbation Theory via the development of generalised alternative variables, culminating in a unique variational formulation.