Journals / Communications Faculty of Sciences University of Ankara Series A1 Mathematics and Statistics / 2026 / Volume: 73 Issue: 3

Notes on the geometry of cotangent bundle and unit cotangent sphere bundle

Pages
—
Publication Date
2024-09-27
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Moreover, we prove that $\mathtt{T}_{1}^{\ast}\mathtt{N}$ carries a contact metric structure and study some of its proprieties.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Let $(\mathtt{N},\mathfrak{g})$ be a Riemannian manifold, by using the musical isomorphisms ♪ and $\natural$ induced by $\mathfrak{g}$, we built a bridge between the geometry of the tangent bundle $\mathtt{TN}$ (resp. the unit tangent sphere bundle $\mathtt{T}_{1}\mathtt{N}$) equipped with the Sasaki metric $\mathfrak{g}_{S}$ (resp. the induced Sasaki metric $\bar{\mathfrak{g}}_{S}$) and that of the cotangent bundle $\mathtt{T}^{\ast}\mathtt{N}$ (resp. the unit cotangent sphere bundle $\mathtt{T}_{1}^{\ast}\mathtt{N}$) endowed with the Sasaki metric $\mathfrak{g}_{\widetilde{S}}$ (resp. the induced Sasaki metric $\tilde{\mathfrak{g}}_{\widetilde{S}}$).
📊
Key Findings & Data:Let $(\mathtt{N},\mathfrak{g})$ be a Riemannian manifold, by using the musical isomorphisms ♪ and $\natural$ induced by $\mathfrak{g}$, we built a bridge between the geometry of the tangent bundle $\mathtt{TN}$ (resp. the unit tangent sphere bundle $\mathtt{T}_{1}\mathtt{N}$) equipped with the Sasaki metric $\mathfrak{g}_{S}$ (resp. the induced Sasaki metric $\bar{\mathfrak{g}}_{S}$) and that of the cotangent bundle $\mathtt{T}^{\ast}\mathtt{N}$ (resp. the unit cotangent sphere bundle $\mathtt{T}_{1}^{\ast}\mathtt{N}$) endowed with the Sasaki metric $\mathfrak{g}_{\widetilde{S}}$ (resp. the induced Sasaki metric $\tilde{\mathfrak{g}}_{\widetilde{S}}$).
💡
Conclusion & Impact:Moreover, we prove that $\mathtt{T}_{1}^{\ast}\mathtt{N}$ carries a contact metric structure and study some of its proprieties.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Unit cotangent sphere bundle · cotangent bundle · Sasaki metric

Abstract

Let $(\mathtt{N},\mathfrak{g})$ be a Riemannian manifold, by using the musical isomorphisms ♪ and $\natural$ induced by $\mathfrak{g}$, we built a bridge between the geometry of the tangent bundle $\mathtt{TN}$ (resp. the unit tangent sphere bundle $\mathtt{T}_{1}\mathtt{N}$) equipped with the Sasaki metric $\mathfrak{g}_{S}$ (resp. the induced Sasaki metric $\bar{\mathfrak{g}}_{S}$) and that of the cotangent bundle $\mathtt{T}^{\ast}\mathtt{N}$ (resp. the unit cotangent sphere bundle $\mathtt{T}_{1}^{\ast}\mathtt{N}$) endowed with the Sasaki metric $\mathfrak{g}_{\widetilde{S}}$ (resp. the induced Sasaki metric $\tilde{\mathfrak{g}}_{\widetilde{S}}$). Moreover, we prove that $\mathtt{T}_{1}^{\ast}\mathtt{N}$ carries a contact metric structure and study some of its proprieties.

🔖

Cite This Article

Kacımı, B., Kadı, F. Z., Özkan, M. (2024). Notes on the geometry of cotangent bundle and unit cotangent sphere bundle. Communications Faculty of Sciences University of Ankara Series A1 Mathematics and Statistics, Volume: 73 Issue: 3. https://doi.org/10.31801/cfsuasmas.1431646

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (18)

  1. Akbulut, S., Özdemir, M., Salimov, A. A., Diagonal lift in the cotangent bundle and its applications, Turk. J. Math., 25(4) (2001), 491-502.
  2. Blair, D. E., When is the tangent sphere bundle locally symmetric?, Geometry and Topology, World Scientific, March (1989), 15-30. https://doi.org/10.1142/9789814434225 0002
  3. Boeckx, E., Vanhecke, L., Characteristic reflections on unit tangent sphere bundles, Houst. J. Math., 23 (1997), 427-448.
  4. Boeckx, E., Vanhecke, L., Geometry of Riemannian manifolds and their unit tangent sphere bundles, Publ. Math. Debrecen, 57(3-4) (2000), 509-533. https://doi.org/10.5486/PMD.2000.2349
  5. Calvaruso, G., Contact metric geometry of the unit tangent sphere bundle, complex, contact and symmetric manifolds, in: Complex, Contact and Symmetric Manifolds (eds. O. Kowalski, E. Musso and D. Perrone), Progress in Mathematics, 234 (2005), 41-57. https://doi.org/10.1007/b138831
  6. Carpenter, P., Gray, A., Willmore, T. J., The curvature of einstein symmetric spaces, Q. J. Math. Oxford, 33(1) (1982), 45-64. https://doi.org/10.1093/qmath/33.1.45
  7. Dombrowski, P., On the geometry of tangent bundle, J. Reine Angew. Math., 210 (1962), 73-88.
  8. Dragomir, S., Perrone, D., Harmonic Vector Fields: Variational Principles and Differential Geometry, Elsevier, Amsterdam, 2011.
  9. Gudmundsson, S., Kappos, E., On the geometry of tangent bundles, Expo. Math., 20 (2002), 1-41. https://doi.org/10.1016/S0723-0869(02)80027-5
  10. Kadi, F. Z., Kacimi, B., Özkan, M., Some results on harmonic metrics, Mediterr. J. Math., 20 (2023), 111. https://doi.org/10.1007/s00009-023-02320-6
  11. Kowalski, O., Curvature of the induced Riemannian metric on the tangent bundle of a Riemannian manifold, J. Reine Angew. Math., 250 (1971), 124-129.
  12. Musso, E., Tricerri, F., Riemannian metrics on tangent bundles, Ann. Mat. Pura. Appl., 150(4) (1988), 1-19. https://doi.org/10.1007/BF01761461
  13. Nikolayevsky, Y., Park, J. H., H-contact unit tangent sphere bundles of Riemannian manifolds, Diff. Geom. Appl., 49 (2016), 301-311. https://doi.org/10.1016/j.difgeo.2016.09.002
  14. Perrone, D., Contact metric manifolds whose characteristic vector field is a harmonic vector field, Differ. Geom. Appl., 20 (2004), 367-378. https://doi.org/10.1016/j.difgeo.2003.12.007
  15. Salimov, A. A., Agca, F., Some properties of Sasakian metrics in cotangent bundles, Mediterr. J. Math., 8 (2011), 243-255. https://doi.org/10.1007/s00009-010-0080-x
  16. Sasaki, S., On the differential geometry of tangent bundles of Riemannian manifolds, Tohoku Math. J., 10 (1958), 338-354. https://doi.org/10.2748/tmj/1178244668
  17. Tashiro, Y., On contact structures on tangent sphere bundles, Tohoku Math. J., 21 (1969), 117-143. https://doi.org/10.2748/tmj/1178243040
  18. Yano, K., Ishihara, S., Tangent and Cotangent Bundles, Dekker, New York, 1973.