Abstract
For pt.IV see ibid., vol.9, p.1711, (1992). The authors set up and solve the general (no symmetries assumed) first-order equations for dust (p=0) relative to an FLRW background in observational coordinates using the fluid-ray (FR) tetrad formalism, with data on the past light cone C-(p0) consisting of galaxy redshifts, observer area distances, galaxy number counts and null shear measures. Cosmological proper motions are not needed in the data set. A detailed framework for constructing solutions from any such data set is given, although no concrete solutions are presented. The character of these solutions will depend heavily on the data themselves.
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