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 …

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 …

We characterize two-point homogeneous spaces, locally symmetric spaces, C and B-spaces
via properties of the standard contact metric structure of their unit tangent sphere bundle …

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 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 …

Contact Metric Geometry of the Unit Tangent Sphere Bundle Page 1 Contact Metric Geometry
of the Unit Tangent Sphere Bundle G. Calvaruso Dipartimento di Matematica “E. De Giorgi” …

本文研究了紧切触度量流形(M, η, g) 上的L (g) 泛函, 该泛函是对Reeb 向量场方向的里奇曲率在
切触度量流形上的积分. 特别地, 我们考虑了紧黎曼流形的单位球丛这一特殊的切触度量流形 …

Curvature Properties of g-natural Contact Metric Structures on Unit Tangent Sphere
Bundles Page 1 Beiträge zur Algebra und Geometrie Contributions to Algebra and …

We study unit tangent bundles T1M for which the structural operator h= 1 2£ ξφ, its
characteristic derivative h=∇ ξh or the characteristic Jacobi operator l= R (·, ξ) ξ is invariant …