24 citations · 65 across the 7 of their papers we have counts for
Showing 2007Show all
3 papers · 1 filter
math.DG2007★ 3 cited
The Mean Curvature of the Second Fundamental Form of a hypersurface
Stefan Haesen, Steven Verpoort
An expression for the first variation of the area functional of the second fundamental form is given for a hypersurface in a semi-Riemannian space. The concept of the "mean curvatu…
gr-qc2007★ 24 cited
Boost invariant marginally trapped surfaces in Minkowski 4-space
Stefan Haesen, Miguel Ortega
The extremal and partly marginally trapped surfaces in Minkowski 4-space, which are invariant under the group of boost isometries, are classified. Moreover, it is shown that there…
gr-qc2007★ 1 cited
A new method to construct spacetimes with a spacelike circle action
Stefan Haesen, Francisco Palomo, Alfonso Romero
A new general procedure to construct realistic spacetimes is introduced. It is based on the null congruence on a time-oriented Lorentzian manifold associated to a certain timelike…