关于四元射影空间的实超曲面

本文研究四元射影空间的实超曲面。从不同的角度刻划了由Lawson构造的一类广义超球面。     

关于2维复射影空间中的等变极小环

本文利用Ｈｓｉａｎｇ和Ｌａｗｓｏｎ的余齐性方法构造了ＣＰ２中无穷多个等变极小环，并刻划了Ｃｌｉｆｏｒｄ环面．     

复射影空间中的CR-子流形

本文从整体的角度研究了复射影空间中某类典型的CR-子流形,建立了若干积分公式和积分不等式,还得到了一些Pinching结果.     

复射影空间中子流形的Gauss映照

本文利用复射影空间到欧氏空间的第一标准嵌入，对于复射影空间的子流形建立了一种广义的Ｇａｕｓｓ映照，并给出了这种广义的Ｇａｕ８ｓ映照是调和映照和相对仿射映照的条件。     

FINITENESS OF HIGHER CODIMENSIONAL DISJOINT MINIMAL GRAPHS

We estimate the number of disjoint open subsets in Rn, which can support area-decreasing minimal graphs. This result generalizes the related results of Li-Wang and Tkachev for minimal hypersurfaces to higher codimensional case.     

关于到酉群U(N)的调和映照的因子分解和uniton数 *

讨论了从单连通区域Ω C∪{∞}到酉群的一类调和映照的因子分解,说明了迷向调和映照与2-uniton理论的等价性,并给出Uhlenbeck关于极小uniton数上界猜测的肯定回答.     

关于四元射影空间的实超曲面

本文研究四元射影空间的实超曲面.从不同的角度刻划了由 Lawson 构造的一类广义超球面.     

ON SPACELIKE AUSTERE SUBMANIFOLDS IN PSEUDO-EUCLIDEAN SPACE

In this article, we construct some spacelike austere submanifolds in pseduoEuclidean spaces. We also get some indefinite special Lagrangian submanifolds by constructing twisted normal bundle of spacelike austere submanifolds in pseduo-Euclidean spaces.     

RIGIDITY THEOREMS OF COMPLETE K?HLER-EINSTEIN MANIFOLDS AND COMPLEX SPACE FORMS

We concentrate on using the traceless Ricci tensor and the Bochner curvature tensor to study the rigidity problems for complete K?hler manifolds. We derive some elliptic differential inequalities from Weitzenb?ck formulas for the traceless Ricci tensor of K?hler manifolds with constant scalar curvature and the Bochner tensor of K?hler-Einstein manifolds respectively. Using elliptic estimates and maximum principle, several L~p and L~∞ pinching results are established to characterize K?hler-Einstein manifolds among K?hler manifolds with constant scalar curvature and complex space forms among K?hler-Einstein manifolds.Our results can be regarded as a complex analogues to the rigidity results for Riemannian manifolds. Moreover, our main results especially establish the rigidity theorems for complete noncompact K?hler manifolds and noncompact K?hler-Einstein manifolds under some pointwise pinching conditions or global integral pinching conditions. To the best of our knowledge,these kinds of results have not been reported.     

常拟Hermite数量曲率Sasaki流形的刚性

本文在常拟Hermite数量曲率Sasaki流形中,利用Schrdinger型算子的特征值和曲率的增长性条件,建立了拟Einstein Sasaki流形和Sasaki空间形式的刚性.