2 papers
gr-qc2025
Differentiability and Other Properties of the Cosmological Volume Function
Leonardo García-Heveling
In a previous work, the regular cosmological volume function was introduced as an alternative to the regular cosmological time function of Andersson, Galloway, and Howard. Bu…
math.DG2025
Conformal transformations of spacetimes without observer horizons
Leonardo García-Heveling, Abdelghani Zeghib
We prove that for a certain class of Lorentzian manifolds, namely causal spacetimes without observer horizons, conformal transformations can be classified into two types: escaping…