null infinity

Fetched 2026-10-26 (cache).

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Noun

1. In a [[closed]] [[space-time]], especially for an [[Einstein cylinder]], null infinity for a given point is the limit of convergence of the [[light cone]] most distant from the given point. That is, it is the limit of a set of points that each have a [[time-like]] [[separation]] from every point that has a [[space-like]] [[separation]] from the given point.

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