Universality of the future chronological boundary
Author(s) -
Steven G. Harris
Publication year - 1998
Publication title -
journal of mathematical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.708
H-Index - 119
eISSN - 1089-7658
pISSN - 0022-2488
DOI - 10.1063/1.532582
Subject(s) - universality (dynamical systems) , causality (physics) , boundary (topology) , mathematics , sort , causal sets , causal structure , spacetime , categorical variable , pure mathematics , mathematical analysis , physics , statistics , arithmetic , quantum field theory in curved spacetime , quantum mechanics , quantum gravity , quantum
The purpose of this note is to establish, in a categorical manner, theuniversality of the Geroch-Kronheimer-Penrose causal boundary when consideringthe types of causal structures that may profitably be put on any sort ofboundary for a spacetime. Actually, this can only be done for the future causalboundary (or the past causal boundary) separately; furthermore, only thechronology relation, not the causality relation, is considered, and the GKPtopology is eschewed. The final result is that there is a unique map, with theproper causal properties, from the future causal boundary of a spacetime ontoany ``reasonable" boundary which supports some sort of chronological structureand which purports to consist of a future completion of the spacetime.Furthermore, the future causal boundary construction is categorically unique inthis regard.Comment: 25 pages, AMS-TeX; 2 figures, PostScript (separate); captions (separate); submitted to Class. Quantum Grav, slight revision: bottom lines legible, figures added, expanded discussion and example
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