9 citations · 13 across the 11 of their papers we have counts for
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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…
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…
Almost conformally almost Fedosov structures
Jan Gregorovič
We study the relations between the projective and the almost conformally symplectic structures on a smooth even dimensional manifold. We describe these relations by a single almost…
Local Generalized Symmetries and Locally Symmetric Parabolic Geometries
Jan Gregorovič, Lenka Zalabová
We investigate (local) automorphisms of parabolic geometries that generalize geodesic symmetries. We show that many types of parabolic geometries admit at most one generalized geod…