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Tangent sphere bundles of variable radii

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초록

We study the geometry of a tangent sphere bundle Tr(M, g) of a Riemannian manifold (M, g) of a variable radius r. Some geometric conditions are obtained for the standard almost contact metric structure (Φ,Σ, η, gr) on Tr(M, g) to be a contact metric structure, and an example is provided.

Abstract

We study the geometry of a tangent sphere bundle Tr(M, g) of a Riemannian manifold (M, g) of a variable radius r. Some geometric conditions are obtained for the standard almost contact metric structure (Φ,Σ, η, gr) on Tr(M, g) to be a contact metric structure, and an example is provided.

참고문헌 (12)

  1. K. M. T. Abbassi, "On g-natural metrics with constant scalar curvature on unit tangent sphere bundles, In Topics in almost Hermitian geometry and related fields", pp.1~29 (2005), World Scientific
  2. D. Blair, "Riemannian geometry of contact and symplectic manifolds", Progress in Math, 203 (2002)
  3. E. Boeckx, "When are the tangent sphere bundles of a Riemannian manifold reducible ?", Trans. Amer. Math. Soc., 355(7), pp.2885~2903 (2003)
  4. E. Boeckx, "Unit tangent sphere bundles with constant scalar curvature", Czechoslovak Math. J., 51(3), pp.523~544 (2001)
  5. Y. D. Chai, "Remarks on n-Einstein unit tangent bundles", Monatsh. Math, 155, pp.31~42 (2008)
  6. J. Cheeger, "On the structure of complete manifolds of nonnegative curvature", Ann. of Math., 96, pp.413~443 (1972)
  7. O. Kowalski, "On tangent sphere bundles with small and large constant radius", Ann. Global Anal. Geom., 18(3-4), pp.207~219 (2000)
  8. O. Kowalski, "On the scalar curvature of tangent sphere bundles with arbitrary constant radius", Bull. Greek Math. Soc., 44, pp.17~30 (2000)
  9. E. Musso, "Riemannian metrics on tangent bundles", Ann. Mat. Pura Appl., 150(1), pp.1~20 (1988)
  10. J. H. Park, "When are the tangent sphere bundles of a Riemannian manifold eta-Einstein?", Ann Glob Anal Geom, 36(3), pp.275~284 (2009)
  11. 박정형, "Notes on tangent sphere bundles of constant radii", 대한수학회지, 46(6), pp.1255~1265 (2009), 대한수학회
  12. M. Sekizawa, "Curvatures of tangent bundles with Cheeger-Gromoll metrics", Tokyo J. Math., 14(2), pp.407~417 (1991)

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