Cosmology in the 2020s Needs Precision and Accuracy: The Case for Euclid/LSST/WFIRST Joint Survey Processing

Cosmological breakthroughs in the 2020s will arise from measuring the redshift evolution of dark energy, resolving the tension in the expansion rate of the Universe, and understanding the impact of dark matter on galaxy substructure. Joint processing of Euclid/LSST/WFIRST data provides the most compelling, economical and tractable path forward.