#weyl's_postulate

Weyl's postulate

In relativistic cosmology, Weyl's postulate stipulates that in the Friedmann model of the universe, the wordlines of fluid particles should be hypersurface orthogonal. Meaning, they should form a 3-bundle of non-intersecting geodesics orthogonal to a series of spacelike hypersurfaces (hyperslices).

Sat 28th

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