9 citations · 13 across the 11 of their papers we have counts for
13 papers
Classification of quaternionic skew-Hermitian symmetric spaces
Ioannis Chrysikos, Jan Gregorovič
We provide a complete classification of quaternionic skew-Hermitian symmetric spaces, namely symmetric spaces that admit a torsion-free -structure for…
Submanifolds of almost quaternionic skew-Hermitian manifolds
Ioannis Chrysikos, Jan Gregorovič
We investigate several classes of submanifolds of almost quaternionic skew-Hermitian manifolds , including almost symplectic, almost complex, almost pseudo-Hermitia…
Models of -nondegenerate CR hypersurface in
Jan Gregorovič, Martin Kolář, David Sykes
We show that every point in a uniformly -nondegenerate CR hypersurface is canonically associated with a model -nondegenerate structure. The -nondegenerate models are basic…
Defining equations of -dimensional model CR hypersurfaces
Jan Gregorovič, David Sykes
We study CR hypersurfaces in that are Levi degenerate with constant rank Levi form, and moreover finitely nondegenerate. Each of these can be described as a deformat…
Fundamental invariants of 2--nondegenerate CR geometries with simple models
Jan Gregorovič
This article studies the fundamental invariants of 2--nondegenerate CR geometries with simple models. We show that there are two sources of these invariants. The first source is th…
On equivalence problem for 2--nondegenerate CR geometries with simple models
Jan Gregorovič
In this article, we solve the equivalence problem for 2--nondegenerate CR geometries that have (at every point) a homogeneous space as a maximally symmetric model for sim…