Geodesic
Transformation to Liénard form
Electronic Journal of Differential Equations, Tome 2000 (2000).

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: We show that certain two-dimensional differential systems can be transformed to a system of Lienard type. This enables known criteria for the existence of a centre for Lienard systems to be exploited, so extending the range of techniques which are available for proving that conditions which are known to be necessary for a centre are also sufficient.
Keywords: ordinary differential equations, polynomial systems, Liénard systems 
@article{EJDE_2000__2000__a12,
     author = {Albarakati, W.A. and Lloyd, N.G. and Pearson, J.M.},
     title = {Transformation to {Li\'enard} form},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2000},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a12/}
}
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Albarakati, W.A.; Lloyd, N.G.; Pearson, J.M. Transformation to Liénard form. Electronic Journal of Differential Equations, Tome 2000 (2000). http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a12/