Page 58 - Nature Of Space And Time
P. 58
final
observers
singularity
event horizon
world line
of observer
maximum area
of event horizon
centre of centre of
symmetry symmetry
Euclidean
region
of time. Roger's proposal is that the Weyl tensor should vanish at one end of time but not
the other. The Weyl tensor is that part of the curvature of spacetime that is not locally
determined by the matter through the Einstein equations. It would have been small in
the smooth ordered early stages. But large in the collapsing universe. Thus this proposal
would distinguish the two ends of time and so might explain the arrow of time.
universe irregular,
Weyl tensor large
universe smooth,
Weyl tensor small
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