1.The general event horizon formula of black hole is given from null hypersurface equation.
从零曲面方程发,导了黑洞视界面普遍公式.
2.In this paper , a rigidity theorem of hypersurface in real space form will begiven.In addition, we obtain rigidity theorems of submanifold in sphere which improvethe result of Hou and Xu.
发,导
普遍公式.
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间形式
理，同时也得到求面中子流形
