9 citations · 15 across the 24 of their papers we have counts for
23 papers · 1 filter
Infinitesimal CR Symmetries of Accidental CR Structures
C. Denson Hill, Joël Merker, Zhaohu Nie +1
In this companion paper to our article {\em Accidental CR structures} (arxiv.org, January 2023), thought of as an appendix not submitted for publication, we provide complete explic…
Accidental CR structures
C. Denson Hill, Joël Merker, Zhaohu Nie +1
We noticed a discrepancy between Élie Cartan and Sigurdur Helgason about the lowest possible dimension in which the simple exceptional Lie group can be realized. This r…
A stability theorem for projective manifolds
Judith Brinkschulte, C. Denson Hill, Mauro Nacinovich
We consider smooth deformations of the structure of a smooth -pseudoconcave compact submanifold of a reduced complex analytic variety outside…
Flexible and inflexible submanifolds
Judith Brinkschulte, C. Denson Hill
In this paper we prove new embedding results for compactly supported deformations of submanifolds of : We show that if is a -pseudoconcave subman…
Aspects of the Levi form
Judith Brinkschulte, C. Denson Hill, Jürgen Leiterer +1
We discuss various analytical and geometrical aspects of the Levi form, which is associated with a CR manifold having any CR dimension and any CR codimension.
Lorentzian structures and nonembeddability
Judith Brinkschulte, C. Denson Hill
In this paper we construct examples of deformations of Lorentzian hypersurfaces which are embeddable at all points outside an arbitrarily small compact set whose interior…