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Cosmology without averaging

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If you have a question about this talk, please contact Camille Bonvin.

Averaging is a concept that is routinely used in cosmology, but is very difficult to formulate within general relativity. In this talk I will discuss some of these difficulties, and why they are problematic for cosmology. I will then move on to discuss models of the Universe that do not require any averaging. These models allow us to study the emergence of homogeneous and isotropic cosmologies without assuming the existence of such spaces to begin with. They therefore also allow insights into the averaging problem, and the back-reaction of structures on the large-scale evolution of the Universe in cosmology.

This talk is part of the Cosmology Lunch series.

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