3
Relativistic Cosmology
This section is organized to track the chronological events in
the history of the early or relativistic Universe, focusing
mainly on four defining moments: (i) the Big Bang singularity and
the dynamics of the very early Universe, (ii) inflation and its
generic nature, (iii) QCD phase transitions, and (iv) primordial
nucleosynthesis and the freeze-out of the light elements. The
late or post-recombination epoch is reserved to a separate
Section
4
.