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

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math.DG2026

Topological Obstructions to Riemannian-Lorentzian Continuation

Nathalie E. Rieger, Ödül Tetik

Motivated by problems in instanton continuation, we establish geometro-topological selection rules for continuing a Riemannian region into a Lorentzian region through a smooth tran…

math.DG2026

Möbius-Type Structures in Non-Orientable Singular Semi-Riemannian Manifolds

Nathalie E. Rieger

Our objective is to illuminate the global structure of non-orientable manifolds with signature-changing metrics, with particular emphasis on global topological obstructions. Using…