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Paper detail

On curvature bounds in Lorentzian length spaces

We introduce several new notions of (sectional) curvature bounds for Lorentzian pre-length spaces: On the one hand, we provide convexity/concavity conditions for the (modified) time separation function, and, on the other hand, we study four-point conditions, which are suitable also for the non-intrinsic setting. Via these concepts we are able to establish (under mild assumptions) the equivalence of all previously known formulations of curvature bounds. In particular, we obtain the equivalence of causal and timelike curvature bounds as introduced in Kunzinger and Sämann (Ann. Glob. Anal. Geom. 54(3):399-447, 2018).

preprint2024arXivOpen access
Tobias BeranMichael KunzingerFelix Rott
math.MGmath.DG
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Tobias BeranMichael KunzingerFelix Rott

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