Gratus, Jonathan and Gallego Torrome, Ricardo (2018) On K-Jet Field Approximations to Geodesic Deviation Equations. International Journal of Geometric Methods in Modern Physics, 15 (12): 1850199. ISSN 0219-8878
Abstract
Let M be a smooth manifold and S a semi-spray defined on a sub-bundle C of the tangent bundle TM . In this work it is proved that the only non-trivial k-jet approximation to the exact geodesic deviation equation of S, linear on the deviation functions and invariant under an specific class of local coordinate transformations is the Jacobi equation. However, if the linearity property on the dependence in the deviation functions is not imposed, then there are differential equations whose solutions admit k-jet approximations and are invariant under arbitrary coordinate transformations. As an example of higher order geodesic deviation equations we study the first and second order geodesic deviation equations for a Finsler spray.