Understanding cosmology and the evolution of structure are not two different endeavors
Daniel Gruen
Stanford University

One of the key avenues towards cosmological discovery in the near future lies in statistics based on galaxies and clusters identified in imaging surveys, and their weak gravitational lensing effect. I will report on the leading cosmological constraints derived from DES first-year data that use different, lensing-empowered views of the matter density field. The limiting factor of these studies is the simplified model for the non-linear and astrophysical evolution of structure on the galaxy to cluster scale that we are currently able to apply. I will outline how more advanced modeling, joint probes, and well-designed complementary imaging and spectroscopic surveys are thus key to delivering on the promise of DES and LSST.