局部对称共形平坦黎曼流形的2－调和超曲面

2-harmonic Hypersurface in a Locally Symmetric Comform Flat Riemannian Manifold

将单位球面中紧致２－调和超曲面关于第二基本形式长度平方的Ｐｉｎｃｈｉｎｇ结果推广到局部对称共形平坦黎曼流形中的紧致２－调和超曲面．

he pinching result of the length square of the second fundament form on the2-harmonic hypersurface in a sphere is generalized to the 2-harmonicHypersurdface in a Locally Symmetric Comform Flat Riemannian Manifold.