# Agenda

# Thursday 31 May 2018

### CosmoBack

From Inhomogeneous gravity to cosmological back-reaction: Theoretical opportunity? Observational evidence?, co-organized by Thomas Schucker (CPT)

CosmoBack is the opportunity to bring together two communities who rarely meet: theoretical cosmologists who actively work on inhomogeneous models and general relativity, possibly open to the backreaction conjecture, and physical cosmologists and astronomers including the leaders of the major past, ongoing, and future observational projects, which standardly use the FLRW model to interpret the data. In order to foster stimulating interactions the contributed talk will be 20-25 minutes long, every day will be concluded by a keynote session led by a senior scientist, and the attendance will be limited to about 50 people. The closing discussion of the workshop will be introduced by a review by G.F.R. Ellis (University of Cape Town). Inspiring discussions about the actual opportunity to revisit the cosmological standard model are expected!

In order to assure a broad audience and a rare opportunity for Ph.D. students and curious researchers, this workshop will be prepared by a series of six introductory lectures for a total of about ten hours: Measures in General Relativity (T. Schucker, CPT Marseille), Relativistic cosmology: From perturbation theory to N-body simulations (R. Durrer, Geneva), From the averaging problem to backreaction (T. Buchert, CRAL Lyon), Cosmic variance and other fluctuations (N. Kaiser, IfA Honolulu & U. Paris-Sorbonne), Cosmological models beyond ΛCDM (P. Brax, IPhT-CEA Saclay), Bayesian inference in cosmology: statistical evidence against Lambda? (A. Heavens, Imperial College, London).