On symmetric group S 3 actions on spin 4-manifolds. Liu, Ximin; Li, Hongxia — 2007 Acta Mathematica Universitatis Comenianae. New Series
Complete hypersurfaces with constant scalar curvature in a sphere Ximin Liu; Hongxia Li — 2005 Commentationes Mathematicae Universitatis Carolinae In this paper, by using Cheng-Yau’s self-adjoint operator □ , we study the complete hypersurfaces in a sphere with constant scalar curvature.