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SUBMANIFOLDS IN S~(n+p) WITH PARALLEL MBIUS FORM
作者姓名:Xia QiaolingDept.of Math.  Zhejiang Univ.  Hangzhou  China.
作者单位:Xia QiaolingDept.of Math.,Zhejiang Univ.,Hangzhou 310027,China.
基金项目:the National Natural Science Foundation of China ( 1 0 2 71 1 0 6) ,the Natural ScienceFoundation of Zhejiang Province ( M1 0 30 4 7) and the Education Department of Zhejiang Province( 2 0 0 30 342 )
摘    要:§ 1 IntroductionLet x:M→ Sn+p be an n-dimensional submanifold in the unit sphere without umbilicpoints.Let { ei} be a local orthonormal basis with respectto the firstfundamental form I=dx·dx with dual basis{ θi} .Let II =∑ijαhαijθiθjeαbe the second fundamental form of xand H =∑αHαeαbe the mean curvature vector of x,where we use the range of indices:1≤ i,j,k,l≤ n,   n + 1≤α,β,γ≤ n + p,Hα=1n∑ihαij,{ eα} is a local orthonormal basis forthe normal bundle ofx.We defi…

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