...This chapter describes some of the attempts to trace the links between theory and observation, showing how the character of the matter distribution we observe developed out of reasonable conditions in the early universe. Opinions on what the universe might have been like at high redshift span...

...This chapter presents the full relativistic analysis of the evolution of mass clustering. The full relativistic theory is needed to deal with three important aspects of density irregularities in the early universe. First, when the pressure is high the relativistic active gravitational mass...