Can I read Open and Closed Universes, Initial Singularities and Inflation on EtoBox?

Open and Closed Universes, Initial Singularities and Inflation by Borde, Arvind is a scholarly article available to read on EtoBox.

What is Open and Closed Universes, Initial Singularities and Inflation about?

The existence of initial singularities in expanding universes is proved without assuming the timelike convergence condition. The assumptions made in the proof are ones likely to hold both in open universes and in many closed ones. (It is further argued that at least some of the expanding closed universes that do not obey a key assumption of the theorem will have initial singularities on other grounds.) The result is significant for two reasons: (a)~previous closed-universe singularity theorems have assumed the timelike convergence condition, and (b)~the timelike convergence condition is known to be violated in inflationary spacetimes. An immediate consequence of this theorem is that a recent result on initial singularities in open, future-eternal, inflating spacetimes may now be extended to include many closed universes. Also, as a fringe benefit, the time-reverse of the theorem may be applied to gravitational collapse.

Author

Borde, Arvind

Published

1994

Language

EN