Geodesics on the tangent sphere bundles over space forms.
Geodesics on the tangent sphere bundles over space forms.
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空间形式上切球束上的测地线。
DOI:
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发表时间:
1976
期刊:
影响因子:
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通讯作者:
S. Sasaki
中科院分区:
文献类型:
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作者:
S. Sasaki
By a space form we mean in this paper any one of the Euclidean «-space £", the unit «-sphere S"[l] in E and the hyperbolic «-space /T[— 1] of sectional curvature — 1 . For brevity, we denote these manifolds by E", S" and H" respectively. If we denote the set of unit tangent vectors of a space form ΑΓ by T1(M}, then Tl(M} with natural topology is the total space of the tangent sphere b ndle π: 71 (M") — > M. The set ?1 (ΛΓ) keeps a natural Riemannian metric induced from the original metric of M" [3], Each geodesic Γ of 71 (Af) is then interpreted s a certain vector field y along a curve C = nF in Af. The purpose of this paper is to characterize Γ in terms of these y and C. The special case of