NBIA Seminar: Asta Heinesen

I will give an introduction to the field of inhomogeneous cosmology focusing on averaging schemes for formulating a large scale cosmological theory from a general relativistic space-time. An important insight from the averaging formalism discussed is that structure in a relativistic space-time induces violation of the spatial curvature conservation law of the Friedmann-Lemaitre-Robertson-Walker class of models usually used for interpreting cosmological data. I will mention some theoretical and observational problems of interest in inhomogeneous cosmology and talk about some of my own work in relation to these questions.