Browsing by Author "Nel, S D"

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    Observational space-times
    (1980) Nel, S D; Ellis, GFR
    The work presented in this thesis forms part of a programme undertaken in collaboration with G.F.R. Ellis and R. Maartens, the primary aim of which is to examine in detail how cosmological observations may be used to determine the large scale structure of space-time (see, e.g., refs. [1-5]). In order to place this work in context as part of the ongoing cosmological enterprise, it is necessary to review briefly the main objectives of cosmology, the basic assumptions underlying most modern attempts to achieve these objectives, and the observational as well as philosophical status of these assumptions.