2025/12/09 by Ge, Jianquan, Tan, Huixin, Yan, Wenjiao +1
Mathematics · #53C20 #53C24 #53C40 #Advanced Harmonic Analysis Research #Differential Geometry (math.DG) #FOS: Mathematics #Geometric Analysis and Curvature Flows #Nonlinear Partial Differential Equations
paper · doi:10.48550/arxiv.2512.08342
openalex publication_date 2025/12/09 · openalex created_date 2025/12/11 · openalex updated_date 2026/07/28
In this paper, we prove that for an n-dimensional closed minimal Willmore hypersurface Mn with constant scalar curvature in the unit sphere \mathbbSn+1, the squared norm S of the second fundamental form of Mn satisfies S\geqslant n+\frac4n+9-√4 n2+60 n+812 if S>n. This proves, in the approximate sense, the Chern conjecture about the second gap (S\geqslant 2n if S>n), which will be fully verified under a further inequality condition about the 4-th mean curvature.