Physics
Scientific paper
Aug 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011cqgra..28p5003b&link_type=abstract
Classical and Quantum Gravity, Volume 28, Issue 16, pp. 165003 (2011).
Physics
Scientific paper
Singularities play an important role in general relativity and have been shown to be an inherent feature of most physically reasonable spacetimes. Despite this, there are many aspects of singularities that are not qualitatively or quantitatively understood. The abstract boundary construction of Scott and Szekeres has proven to be a flexible tool with which to study the singular points of a manifold. The abstract boundary construction provides a 'boundary' for any n-dimensional, paracompact, connected, Hausdorff, C∞ manifold. Singularities may then be defined as entities in this boundary—the abstract boundary. In this paper a topology is defined, for the first time, for a manifold together with its abstract boundary. This topology, referred to as the attached point topology, thereby provides us with a description of how the abstract boundary is related to the underlying manifold. A number of interesting properties of the topology are considered, and in particular, it is demonstrated that the attached point topology is Hausdorff.
Barry Richard A.
Scott Susan M.
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