15 citations · 18 across the 5 of their papers we have counts for
6 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-…
The -Einstein condition on indefinite s-manifolds
Letizia Brunetti
An -Einstein condition is introduced in the context of indefinite g.f.f-manifolds, and a few Schur-type lemmas for indefinite S-manifolds are provided.
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…
An Osserman-type condition on -manifolds with Lorentz metric
Letizia Brunetti
A condition of Osserman type, called -null Osserman condition, is introduced and studied in the context of Lorentz globally framed -manifolds. An explicit example shows the n…
Lightlike hypersurfaces in indefinite -manifolds
Letizia Brunetti, Anna Maria Pastore
In a metric -manifold we study lightlike hypersurfaces tangent to the characteristic vector fields, and owing to the presence of the -structure, we determine some dec…
Curvature of a class of indefinite globally framed -manifolds
Letizia Brunetti, Anna Maria Pastore
We present a compared analysis of some properties of indefinite almost -manifolds and indefinite -manifolds. We give some characterizations in terms of th…