27 citations
2 papers
math.DG2024★ 1 cited
Pseudo-timelike loops in signature changing semi-Riemannian manifolds with a transverse radical
N. E. Rieger, W. Hasse
In 1983, Hartle and Hawking proposed the no-boundary proposal, suggesting that the universe has no beginning in the sense of a spacetime singularity or boundary. Nevertheless, ther…
gr-qc2019★ 27 cited
Redshift in Finsler spacetimes
Wolfgang Hasse, Volker Perlick
We derive and discuss a general redshift formula in Finsler spacetimes. The condition for the existence of a redshift potential is worked out. The results are illustrated with two…