27 citations · 52 across the 5 of their papers we have counts for
5 papers
Principal torus bundles of Lorentzian S-manifolds and the ϕ-null Osserman condition
Letizia Brunetti, Angelo V. Caldarella
The main result we give in this brief note relates, under suitable hypotheses, the ϕ-null Osserman, the null Osserman and the classical Osserman conditions to each other, via semi-…
Curvature properties of -null Osserman Lorentzian -manifolds
Letizia Brunetti, Angelo V. Caldarella
We expound some results about the relationships between the Jacobi operators with respect to null vectors on a Lorentzian -manifold and the Jacobi operators with r…
On paraquaternionic submersions between paraquaternionic Kähler manifolds
Angelo V. Caldarella
In this paper we deal with some properties of a class of semi-Riemannian submersions between manifolds endowed with paraquaternionic structures, proving a result of non-existence o…
Mixed 3-Sasakian structures and curvature
Angelo V. Caldarella, Anna Maria Pastore
In this paper we deal with two classes of mixed metric 3-structures, namely the mixed 3-Sasakian structures and the mixed metric 3-contact structures. Firstly we study some propert…
Mixed metric 3-contact manifolds and paraquaternionic Kähler manifolds
Angelo V. Caldarella, Anna Maria Pastore
We study manifolds endowed with mixed metric 3--contact structures, proving that the distribution spanned by the Reeb vector fields is integrable, with totally geodesic integral ma…