 1 The Expanding Universe

Online text: www.davidtong.org/teaching/cosmology/cosmohtml/S1

Cited passages: Cosmology by David Tong, §1.4.3, “The Virial Theorem and Galaxy Clusters”: bounded positions and velocities, existence of averages, equation (1.74) and endpoint limit; Cosmology by David Tong, §1.4.3, “The Virial Theorem and Galaxy Clusters”: self-averaging assumption and mass estimate (1.75).