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20242026
most citedPseudo-timelike loops in signature changing semi-Riemannian manifolds with a transverse radical

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gr-qc2025

A Conceptual Introduction To Signature Change Through a Natural Extension of Kaluza-Klein Theory

Vincent Moncrief, Nathalie E. Rieger

We propose an extension of basic Kaluza-Klein theory in which the higher-dimensional Lorentzian manifold develops a Cauchy horizon rather than remaining globally hyperbolic as in t…

math.DG2025

Embedding Signature-Changing Manifolds: A Braneworld and Kaluza-Klein Perspective

N. E. Rieger

We investigate a class of semi-Riemannian manifolds characterized by smooth metric signature changes with a transverse radical. This class includes spacetimes relevant to cosmologi…