一类洛伦兹流形的2-调和类空超曲面的一个拼挤定理

A Pinching Theorem of 2-Harmonic Spacelike Submanifolds in a Class of Lorentz Manifold

研究局部对称共形平坦洛伦兹流形中的2-调和类空超曲面,得到它对外围空间的一个拼挤定理.

In this paper, we study 2-harmonic spacelike hypersurfaces in a locally symmetric and conformally flat lorentz manifold and obtain a pinching theorem of the class of hypersurfaces to the ambient manifold.