12 citations · 19 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…
Subelliptic biharmonic maps
Sorin Dragomir, Stefano Montaldo
We study subelliptic biharmonic maps, i.e. smooth maps from a compact strictly pseudoconvex CR manifold M into a Riemannian manifold N which are critical points of a certain biener…
Indefinite locally conformal Kaehler manifolds
Sorin Dragomir, Krishan L. Duggal
We study the basic geometric properties of an indefinite locally conformal Kaehler manifold.
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.
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…
Jacobi fields of the Tanaka-Webster connection on Sasakian manifolds
Elisabetta Barletta, Sorin Dragomir
We build a variational theory of geodesics of the Tanaka-Webster connection on a strictly pseudoconvex CR manifold.