4 citations · 4 across the 3 of their papers we have counts for
3 papers
math.DG2008★ 4 cited
Rigidity at the boundary for conformal structures and other Cartan geometries
Charles Frances
In this paper, we consider the problem of building a conformal boundary, embedding a pseudo-Riamnnian manifold as an open subset of a bigger one. We get first results about conform…
math.DG2007
Actions of semisimple Lie groups preserving a degenerate Riemannian metric
Esmaa Bekkara, Charles Frances, Abdelghani Zeghib
We prove a rigidity of the lightcone in Minkowski space. It is essentially the unique space endowed with a degenerate Riemannian metric, of lightlike type, and supporting an isomet…
math.DG2007
An embedding theorem for automorphism groups of Cartan geometries
Uri Bader, Charles Frances, Karin Melnick
We prove a theorem relating the automorphism group of a Cartan geometry to the group on which the geometry is modeled: a component of the adjoint representation of the first embeds…