§FRW models have a
matter dominated singularity (spatial curvature negligible)
§This is non-generic:
for p=wr (w<1) matter is negligible, singularities are velocity
dominated, Weyl curvature dominates over Ricci
curvature
§Kasner (vacuum Bianchi
I) is paradigmatic
§BLK conjecture:
Bianchi IX ÒmixmasterÓ
(a chaotic sequence of Kasner phases) is generic
§No mixmaster for w=1
and massless scalar field
§Isotropic singularity
for w>1