28 citations · 29 across the 7 of their papers we have counts for
4 papers · 1 filter
Compact Cauchy horizons admit constant surface gravity
Raymond A. Hounnonkpe, Ettore Minguzzi
We prove that in any spacetime dimension and under the null energy condition, every totally geodesic connected smooth compact null hypersurface (hence every compact Cauchy horizon)…
Horizon classification via Riemannian flows
R. A. Hounnonkpe, E. Minguzzi
We point out that the geometry of connected totally geodesic compact null hypersurfaces in Lorentzian manifolds is only slightly more specialized than that of Riemannian flows over…
Regularity and temperature of stationary black hole event horizons
R. A. Hounnonkpe, E. Minguzzi
Available proofs of the regularity of stationary black hole event horizons rely on certain assumptions on the existence of sections that imply a differentiability assumption.…
Globally hyperbolic spacetimes can be defined without the 'causal' condition
R. A. Hounnonkpe, E. Minguzzi
Reasonable spacetimes are non-compact and of dimension larger than two. We show that these spacetimes are globally hyperbolic if and only if the causal diamonds are compact. That i…