Progress of Theoretical Physics Supplement · 1984 · 1.7K citations · 0 references
Natural SciencesPhysicsCosmologyRelativityTheoretical PhysicsCosmological Perturbation TheoryEinstein Field EquationsPerturbation TheoryPhysical CosmologyTheoretical CosmologyUniverse GeometryCosmological Perturbation GeometryFriedmann - Lemaître - Robertson - Walker CosmologyGauge Invariant ObservablesGauge Invariant PerturbationsGauge-invariant Perturbation TheoryHomogeneous CosmologiesIsotropic CosmologiesLinear Perturbation Theory
The linear perturbation theory of spatially homogeneous and isotropic universes is reviewed and reformulated extensively. In the first half of the article, a gauge-invariant formulation of the theory is carried out with special attention paid to the geometrical meaning of the perturbation. In the second half of the article, the application of the theory to some important cosmological models is discussed.