Moreover we give two important applications of this concept in the Lorentzian settings, which are the doubly warped product generalized Robertson-Walker space-time and doubly warped product standard static space-time.
Key Findings & Data:We obtain some results when the vector field is also 𝜁 (Ric) on factor manifolds.We prove that if a vector field is a 𝜁 (Ric)-vector field on a doubly warped product manifold, it is also a 𝜁 (Ric)-vector field on the factor manifolds under certain conditions.
💡
Conclusion & Impact:Moreover we give two important applications of this concept in the Lorentzian settings, which are the doubly warped product generalized Robertson-Walker space-time and doubly warped product standard static space-time.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:𝜁(Ric)-vector field · warped product manifold · standard static space-times
Abstract
We investigate 𝜁 (Ric)-vector fields on doubly warped product manifolds. We obtain some results when the vector field is also 𝜁 (Ric) on factor manifolds.We prove that if a vector field is a 𝜁 (Ric)-vector field on a doubly warped product manifold, it is also a 𝜁 (Ric)-vector field on the factor manifolds under certain conditions. Also, we show that a vector field on a doubly warped product manifold can be a 𝜁 (Ric)-vector field with some conditions. Moreover we give two important applications of this concept in the Lorentzian settings, which are the doubly warped product generalized Robertson-Walker space-time and doubly warped product standard static space-time.
Aydın, S. G., Traore, M., Taştan, H. M. (2023). 𝜁 (Ric)-vector fields on doubly warped product manifolds. Istanbul Journal of Mathematics, Volume: 1 Issue: 2. https://doi.org/10.26650/ijmath.2023.00008
Allison, D.E., 1988, Geodesic completeness in static space-times, Geom. Dedic., 26, 85-97. google scholar
Allison, D.E., 1998, Energy conditions in standard static space-times, Gen. Relativ. Gravit., 20(2), 115-122. google scholar
Allison, D.E., Ünal, B., 2003, Geodesic structure of standard static space-times, J. Geom. Phys. 46(2), 193–200. google scholar
Besse, A.L., 2007, Einstein Manifolds, Classics in Mathematics, Springer: Berlin, Germany. google scholar
Bishop, R. L., O’Neill, B., 1969, Manifolds of negative curvature, Trans. Amer. Math. Soc., 145(1), 1-49. google scholar
Blaga, A.M., Taştan, H.M., 2022, Gradient solitons on doubly warped product manifolds, Rep. Math. Phys., 89(3), 319-333. google scholar
Chen, B.Y., 2017, Differential geometry of warped product manifolds and submanifolds, World Scientific. google scholar
Chen, B.Y., 2015, Some results on concircular vector fields and their applications to Ricci solitons, Bull. Korean Math. Soc., 52(5), 1535–1547. google scholar
De, U.C., Shenaway, S., Ünal, B., 2021, 𝜑(Ric)-vector fields on warped product manifolds and applications, Afr. Mat, 32, 1709-1716. google scholar
Ehrlich, P.E., 1974, Metric deformations of Ricci and sectional curvature on compact Riemannian manifolds, P.h.D. Dissertation, SUNNY Stony Brook, New York. google scholar
El-Sayied, H. K., Mantica, C. A., Shenawy, S. Syied, N., 2020, Gray’s Decomposition on Doubly Warped Product Manifolds and Applications, Filomat, 34(11), 3767-3776. google scholar
Flores, J.L., Sánchez, M., 2000, Geodesic connectedness and conjugate points in GRW spacetimes, J. Geom. Phys., 36(3-4), 285-314. google scholar
Gutierrez, M., Olea, B., 2012, Semi-Riemannian manifolds with a doubly warped structure, Rev. Mat. Iberoam., 28(1), 1-24. google scholar
Hinterleitner, I., Kiosak, V.A, 2008, 𝜑(Ric)-vector fields in Riemannian spaces, Arch. Math., 44(5), 385–390. google scholar
Hinterleitner, I., Kiosak, V.A, 2009, 𝜑(Ric)-vector fields on conformally flat spaces, AIP. Conf. Prof., 1191(1), 98-103. google scholar
Kırık, B., Özen Zengin, F., 2015, Conformal mappings of quasi-Einstein manifolds admitting special vector fields, Filomat, 29(3), 525–534. google scholar
Kırık, B., Özen Zengin, F., 2019, Applications of a special generalized quasi-Einstein manifold, Bull.Iran.Math. Soc., 45, 89–102. google scholar
Kobayashi, S., 1995, Transformations groups in differential geometry, Classic in Mathematics, Springer: Berlin, Germany. google scholar
O’Neill, B., 1983, Semi-Riemannian Geometry with Applications to Relativity, Academic Press Limited: London, England. google scholar
Sánchez, M., 1998, On the geometry of generalized Robertson–Walker spacetimes: geodesics, Gen. Relativ. Gravit., 30(6), 915-93. google scholar
Sánchez, M., 1999, On the geometry of generalized Robertson–Walker space times: curvature and killing fields, J. Geom. Phys., 31(1), 1-15. google scholar
Özen Zengin, F., Kırık, B., Conformal mappings of nearly quasi-Einstein manifolds, Miskolc Math. Notes, 14(2), 629–636. google scholar