η-EINSTEIN TANGENT SPHERE BUNDLES OF CONSTANT RADII

Author:

CHUN SUN HYANG1,PARK JEONG HYEONG1,SEKIGAWA KOUEI2

Affiliation:

1. Department of Mathematics, Sungkyunkwan University, Suwon 440-746, Korea

2. Department of Mathematics, Faculty of Science, Niigata University, Niigata, 950-2181, Japan

Abstract

We study the geometric properties of the base manifold for the tangent sphere bundle of radius r satisfying the η-Einstein condition with the standard contact metric structure. One of the main theorems is that the tangent sphere bundle of the n(≥3)-dimensional locally symmetric space, equipped with the standard contact metric structure, is an η-Einstein manifold if and only if the base manifold is a space of constant sectional curvature [Formula: see text] or [Formula: see text].

Publisher

World Scientific Pub Co Pte Lt

Subject

Physics and Astronomy (miscellaneous)

Reference25 articles.

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2. Riemannian geometry of contact and symplectic manifolds;Blair D. E.,1978

3. WHEN IS THE TANGENT SPHERE BUNDLE LOCALLY SYMMETRIC?

4. When are the tangent sphere bundles of a Riemannian manifold reducible?

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