12 citations · 25 across the 8 of their papers we have counts for
8 papers
The mixed Einstein-Hilbert action and extrinsic geometry of foliated manifolds
Elisabetta Barletta, Sorin Dragomir, Vladimir Rovenski
We develop variation formulas for the quantities of extrinsic geometry for adapted variations of metrics on almost-product (e.g. foliated) Riemannian manifolds, and apply them to s…
Lightlike foliations of semi-Riemannian manifolds
Elisabetta Barletta, Sorin Dragomir, Krishan L. Duggal
Using screen distributions and lightlike transversal vector bundles we develop a theory of degenerate foliations of semi-Riemannian manifolds.
The Lichnerowicz theorem on CR manifolds
Elisabetta Barletta
We obtain a Bochner type formula and an estimate from below on the spectrum of the sublaplacian of a compact strictly pseudoconvex CR manifold.
On the curvature groups of a CR manifold
Elisabetta Barletta, Sorin Dragomir
We show that any contact form whose Fefferman metric admits a nonzero parallel vector field is pseudo-Einstein of constant pseudohermitian scalar curvature. As an application we co…
On the boundary behavior of the holomorphic sectional curvature of the Bergman metric
Elisabetta Barletta
We obtain a conceptually new differential geometric proof of P.F. Klembeck's result that the holomorphic sectional curvature of a strictly pseudoconvex domain approaches (in the bo…
On the pseudohermitian sectional curvature of a strictly pseudoconvex CR manifold
Elisabetta Barletta
We study the pseudohermitian sectional curvature of a CR manifold.