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Curvature bounds, regularity and inextendibility of spacetimes

Beran, Tobias, Harvey, John ORCID: https://orcid.org/0000-0001-9211-0060 and Sämann, Clemens 2026. Curvature bounds, regularity and inextendibility of spacetimes. Classical and Quantum Gravity 43 , 145010. 10.1088/1361-6382/ae82af

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Abstract

We provide a completely new relation between curvature bounds and definiteness of the causal character of maximizers by exploiting the robust notion of synthetic curvature. This enables us to relate low-regularity inextendibility of spacetimes to unboundedness of curvature - which is at present unattainable using classical methods - thereby strengthening and complementing the results of Grant-Kunzinger-Saemann (2019) significantly.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Schools > Mathematics
Publisher: IOP Publishing
ISSN: 0264-9381
Date of First Compliant Deposit: 6 July 2026
Date of Acceptance: 25 June 2026
Last Modified: 05 Aug 2026 09:30
URI: https://orca.cardiff.ac.uk/id/eprint/187933

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