title: The structure of weakly stable minimal hypersurfaces.
abstract: In this short communication, we announce results from our research on the structure of complete noncompact oriented weakly stable minimal hypersurfaces in a manifold of nonnegative sectional curvature. In particular, a complete oriented weakly stable minimal hypersurface in Rm, m > or = 4, must have only one end; any complete noncompact oriented weakly stable minimal hypersurface has only one end if the complete oriented ambient manifold Nm, m > or = 7, has nonnegative sectional curvature and Ricci curvature bounded below by a positive constant; a complete oriented weakly stable minimal hypersurface in Rm, m > or = 4, with finite total scalar curvature is a hyperplane.
authors.affiliation: Instituto de Matemática, Universidade Federal Fluminense, 24020-140 Niterói, RJ, Brazil. xcheng@impa.br
authors.forename: Xu
authors.initials: X
authors.lastname: Cheng
authors.forename: Leung-Fu
authors.initials: LF
authors.lastname: Cheung
authors.forename: Detang
authors.initials: D
authors.lastname: Zhou