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math.DG2022★ 1 cited
Etude des (n+1)-tissus de courbes en dimension n
Dufour Jean-Paul, Daniel Lehmann
For -webs by curves in an ambiant -dimensional manifold, we first define a generalization of the well known Blaschke curvature of the dimension two, which vanishes iff th…
math.DG2022
Le rang des tissus de Nakai
Jean Paul Dufour, Daniel Lehmann
According to Alain Hénaut, a planar 4-web is called Nakai's web if the cross-ratio of the tangents to the four foliations at each point is constant and if it has no hexagonal 3-sub…
math.DG2015
Courbure des tissus planaires définis implicitement par une équation différentielle polynomiale en y'. Programmation
Jean-Paul Dufour, Daniel Lehmann
The aim of this paper is mainly, after some theoretical explanations, to provide a program on Maple for computing, whatever be d, the curvature of the planar d-web implicitely defi…