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常平均曲率子流形
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作者 欧阳崇珍 邱天珍 《南昌大学学报(理科版)》 CAS 北大核心 2004年第1期8-11,共4页
设M是等距浸入在常曲率黎曼流形Sn+p(c)的n维紧致黎曼流形,若Mn是极小的,有著名的Simons不等式和丘成桐不等式。本文推广它们到常曲率黎曼流形的平行平均曲率的子流形的情形。
关键词 常平均曲率子流形 紧致黎曼流形 等距浸入 平均曲率向量 第二基本形式 长度 截面曲率 下确界
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Mbius geometry of three-dimensional Wintgen ideal submanifolds in S^5 被引量:1
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作者 XIE ZhenXiao LI TongZhu +1 位作者 MA Xiang WANG ChangPing 《Science China Mathematics》 SCIE 2014年第6期1203-1220,共18页
Wintgen ideal submanifolds in space forms are those ones attaining equality at every point in the socalled DDVV inequality which relates the scalar curvature,the mean curvature and the normal scalar curvature.This pro... Wintgen ideal submanifolds in space forms are those ones attaining equality at every point in the socalled DDVV inequality which relates the scalar curvature,the mean curvature and the normal scalar curvature.This property is conformal invariant;hence we study them in the framework of Mbius geometry,and restrict to three-dimensional Wintgen ideal submanifolds in S5.In particular,we give Mbius characterizations for minimal ones among them,which are also known as(3-dimensional)austere submanifolds(in 5-dimensional space forms). 展开更多
关键词 Wintgen ideal submanifolds DDVV inequality MSbius geometry austere submanifolds complexcurves
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