2 papers
math.DG2019
Isoperimetric problems for spacelike domains in generalized Robertson-Walker spaces
Ben Lambert, Julian Scheuer
We use a locally constrained mean curvature flow to prove the isoperimetric inequality for spacelike domains in generalized Robertson-Walker spaces satisfying the null convergence…
math.DG2019
Prescribed -symmetric curvature hypersurfaces in de Sitter space
Daniel Ballesteros-Chávez, Wilhelm Klingenberg, Ben Lambert
We prove existence of compact spacelike hypersurfaces with prescribed k - curvature in de Sitter space, where the prescription function depends on both space and the tilt function.