On Homotopic Harmonic Maps
On Homotopic Harmonic Maps
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DOI:
10.4153/cjm-1967-062-6
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发表时间:
1967
期刊:
影响因子:
--
通讯作者:
P. Hartman
中科院分区:
文献类型:
--
作者:
P. Hartman
Let M, M′ be C∞ Riemann manifolds such that (1.0) M is compact; (1.1) M′ is complete and its sectional curvatures are non-positive. In terms of local coordinates x = (x 1, … , xn ) on M and y = (y 1, … , ym ) on M′, let the respective Riemann elements of arc-length be and Γ i jk , Γ′ α βγ be the corresponding Christoffel symbols. When there is no danger of confusion, x (or y) will represent a point of M (or M′) or its coordinates in some local coordinate system.