%0 Journal Article
%T Classes d'homotopie de champs de vecteurs Morse-Smale sans singularit¨¦ sur les fibr¨¦s de Seifert
%A Emmanuel Dufraine
%J Mathematics
%D 2003
%I arXiv
%X In the first part of this paper, we consider smooth maps from a compact orientable 3-manifold without boundary to the 2-sphere. We give a geometric criterion to decide whether two given maps are homotopic, based on the sets of points where the maps are equal or antipodal. We extend this criterion to non-singular vector fields (and co-oriented plane fields) on 3-manifolds. In the second part, we make use of this criterion to study non-singular Morse-Smale vector fields on Seifert manifolds, giving a simple proof of a result of Yano.
%U http://arxiv.org/abs/math/0312127v1