Publications

All full texts are also available on arXiv.

Preprints

(with A. Zeghib) Conformal transformations of spacetimes without observer horizons. arXiv:2505.11148.
(with A. Zeghib) Isometries of spacetimes without observer horizons. arXiv:2502.13904.

(with G.J. Galloway) Mean Curvature, Singularities and Time Functions in Cosmology. In: Barrera, W., Herrera, J., Navarrete, J.P., Navarro, M., Palmas, O., Solis, D.A. (eds) Progress in Lorentzian Geometry. GELOMA 2024. Springer Proceedings in Mathematics & Statistics, vol 512. Springer, Cham.
Minimal Elements of the Causal Boundary with Applications to Spacetime Splitting. Mediterranean Journal of Mathematics 22, 63 (2025).
(with A. Burtscher) Time Functions on Lorentzian Length Spaces. Annales Henri Poincaré 26, 1533–1572 (2025).
Volume Singularities in General Relativity. Letters in Mathematical Physics 114, 71 (2024).
Radial Gravitational Collapse Causes Timelike Incompleteness. Physical Review D 109, 084034 (2024).
(with A. Burtscher) Global Hyperbolicity through the Eyes of the Null Distance. Communications in Mathematical Physics 405, 90 (2024).
Topology change with Morse functions: progess on the Borde–Sorkin conjecture. Advances in Theoretical and Mathematical Physics 27(4), 1159-1190 (2023).
(with E. Soultanis) Causal bubbles in globally hyperbolic spacetimes. General Relativity and Gravitation 54, 155 (2022).
Causality theory of spacetimes with continuous Lorentzian metrics revisited. Classical and Quantum Gravity 38, 145028 (2021).

Time and Causality in Non-smooth Lorentzian Geometry. PhD Thesis, Radboud University Nijmegen (2023)