On Tangent Sphere Bundles with Small or Large Constant Radius Page 1 Annals of Global
Analysis and Geometry 18: 207–219, 2000. © 2000 Kluwer Academic Publishers. Printed in the …

Starting from g g-natural pseudo-Riemannian metrics of suitable signature on the unit
tangent sphere bundle T_1 MT 1 M of a Riemannian manifold (M, ⟨, ⟩)(M,⟨,⟩), we construct …

SEMI-SYMMETRIC CONTACT METRIC Page 1 YOKOHAMA MATHEMATICAL JOURNAL VOL.
49, 2002 SEMI-SYMMETRIC CONTACT METRIC THREE-MANIFOLDS By G. CALVARUSO …

We construct a three-parameter family of contact metric structures on the unit tangent sphere
bundle T 1 M of a Riemannian manifold M and we study some of their special properties …

It is well known that the unit tangent sphere bundle T1Sm of the standard sphere Sm can be
naturally identified with the Stiefel manifold V2Rm+ 1= SO (m+ 1)/SO (m− 1). In this paper …

In this paper, we show that if an integrable contact pseudo-metric manifold of dimension 2
n+ 1, n≥ 2, has constant sectional curvature κ κ, then the structure is Sasakian and κ= ε= g …

Let (M, g) be a Riemannian manifold, TM its tangent bundle and T1M its unit tangent sphere
bundle. The family of all Riemannian g-natural metrics G on TM have been determined by …

ON THE CLASSIFICATION OF CONTACT RIEMANNIAN MANIFOLDS SATISFYING THE
CONDITION (C) Page 1 Glasgow Math. J. 45 (2003) 475–492. C 2003 Glasgow …

We prove that all g-natural contact metric structures on a two-point homogeneous space are
homogeneous contact. The converse is also proved for metrics of Kaluza–Klein type. We …

We prove that the unit tangent sphere bundle of a Riemannian manifold is semi-symmetric if
and only if it is locally symmetric, ie, the base manifold is either flat or it is two-dimensional …