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Averaging In Cosmology

PHYSICAL REVIEW D, no. 2 (1998): 798-810

Cited: 55|Views12

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gauge invarianceperturbation theory

Abstract

In this paper we discuss the effect of local inhomogeneities on the global expansion of nearly Friedmann-Lemaitre-Robertson-Walker (FLRW) universes, in a perturbative setting. We derive a generic linearized averaging operation for metric perturbations from basic assumptions, and we explicate the issue of gauge invariance. We derive a gaug...More

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Jelle P. Boersma

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