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general relativity allow an observer to view an eternity in a finite time

By Mark L. Hogarth


I investigate whether there are general relativistic spacetimes that allow an observer g to collect in a finite time all the data from the worldline of another observer ~, where the proper length of ~'s worldline is infinite. The existence of these spacetimes has a bearing on certain problems in computation theory. A theorem shows that most standard spacetimes cannot accommodate this scenario. There are however spacetimes which can: anti-de Sitter spacetime is one example. Key words: general relativity, eternity, anti-de Sitter, Pitowsky. 1

Year: 1992
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