SIGMA 3 (2007), 103, 7 pages      arXiv:0711.0814      https://doi.org/10.3842/SIGMA.2007.103
Contribution to the Proceedings of the Seventh International Conference Symmetry in Nonlinear Mathematical Physics

Geometric Linearization of Ordinary Differential Equations

Asghar Qadir
Centre for Advanced Mathematics and Physics, National University of Sciences and Technology, Campus of College of Electrical and Mechanical Engineering, Peshawar Road, Rawalpindi, Pakistan

Received August 13, 2007, in final form October 19, 2007; Published online November 06, 2007; References [17−21] updated November 11, 2007

Abstract
The linearizability of differential equations was first considered by Lie for scalar second order semi-linear ordinary differential equations. Since then there has been considerable work done on the algebraic classification of linearizable equations and even on systems of equations. However, little has been done in the way of providing explicit criteria to determine their linearizability. Using the connection between isometries and symmetries of the system of geodesic equations criteria were established for second order quadratically and cubically semi-linear equations and for systems of equations. The connection was proved for maximally symmetric spaces and a conjecture was put forward for other cases. Here the criteria are briefly reviewed and the conjecture is proved.

Key words: differential equations; geodesics; geometry; linearizability; linearization.

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