Geodesic
On the Riccatti differential polynomials
Acta mathematica Universitatis Comenianae, Tome 79 (2010) no. 2 
A. Ayad. On the Riccatti differential polynomials. Acta mathematica Universitatis Comenianae, Tome 79 (2010) no. 2. http://geodesic.mathdoc.fr/item/AMUC_2010_79_2_a9/
@article{AMUC_2010_79_2_a9,
     author = {A. Ayad},
     title = {On the {Riccatti} differential polynomials},
     journal = {Acta mathematica Universitatis Comenianae},
     year = {2010},
     volume = {79},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/AMUC_2010_79_2_a9/}
}
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Voir la notice de l'article provenant de la source Comenius University

We present in this paper some properties of the Riccatti differential polynomial associated with a homogeneous linear ordinary differential equation. We give a complete description of the differential Newton polygons of its derivatives and its evaluations.