There is a class of metrics on the tangent bundle $TM$ of a Riemannian manifold $(M,g)$ (oriented , or non-oriented, respectively), which are ’naturally constructed’ from the base metric $g$ [Kow-Sek1]. We call them “$g$-natural metrics" on $TM$. To our knowledge, the geometric properties of these general metrics have not been studied yet. In this paper, generalizing a process of Musso-Tricerri (cf. [Mus-Tri]) of finding Riemannian metrics on $TM$ from some quadratic forms on $OM \times \mathbb {R}^m$ to find metrics (not necessary Riemannian) on $TM$, we prove that all $g$-natural metrics on $TM$ can be obtained by Musso-Tricerri’s generalized scheme. We calculate also the Levi-Civita connection of Riemannian $g$-natural metrics on $TM$. As application, we sort out all Riemannian $g$-natural metrics with the following properties, respectively: 1) The fibers of $TM$ are totally geodesic. 2) The geodesic flow on $TM$ is incompressible. We shall limit ourselves to the non-oriented situation.
@article{107936,
author = {Mohamed Tahar Kadaoui Abbassi and Ma\^ati Sarih},
title = {On natural metrics on tangent bundles of Riemannian manifolds},
journal = {Archivum Mathematicum},
volume = {041},
year = {2005},
pages = {71-92},
zbl = {1114.53015},
mrnumber = {2142144},
language = {en},
url = {http://dml.mathdoc.fr/item/107936}
}
Abbassi, Mohamed Tahar Kadaoui; Sarih, Maâti. On natural metrics on tangent bundles of Riemannian manifolds. Archivum Mathematicum, Tome 041 (2005) pp. 71-92. http://gdmltest.u-ga.fr/item/107936/
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