© 2001 by London Mathematical Society
© The London Mathematical Society
Scindements de Heegaard des Variétés de Seifert Elliptiques et Euclidiennes
Laboratoire E. Picard, Université Paul Sabatier UMR 5580, 118 route de Narbonne, 31062 Toulouse Cédex, France
Laboratoire de Mathématiques, École Normale Supérieure de Lyon UMR 0128, 46 allée d'Italie, 69364 Lyon Cédex, France
Received 12 February 1996. Revision received 20 October 1997.
It is proved that there is, up to isotopy, a unique irreducible Heegaard splitting in an orientable, closed, connected Seifert 3-manifold with an orientable elliptical or euclidean orbifold basis. Using Hamilton's and Lawson's results, the topological uniqueness is obtained of closed orientable minimal surfaces of a given genus g
2, embedded in a closed orientable Riemannian 3-manifold with strictly positive Ricci curvature.