Nonexistence of quasi-harmonic spheres with large energy

Nonexistence of quasi-harmonic spheres with large energy
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DOI:
10.1007/s00229-011-0490-5
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发表时间:
2010-10
影响因子:
0.6
通讯作者:
Jiayu Li;Y. Yang
Jiayu Li;Y. Yang
中科院分区:
数学4区
文献类型:
--
作者:
Jiayu Li;Y. Yang

文献摘要

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准调和球的不存在是调和映象热流长时间存在和收敛的必要条件。设(N,h)是完备的非紧黎曼流形.设(N,h)的泛覆盖中存在一个多项式增长的非负严格凸函数.这推广了第一作者和X. Zhu(Calc.变量,2009年)。我们的方法本质上是Moser迭代,因此比较基本。
The absence of quasi-harmonic spheres is necessary for long time existence and convergence of harmonic map heat flows. Let (N,h) be a complete noncompact Riemannian manifold. Assume the universal covering of (N,h) admits a nonnegative strictly convex function with polynomial growth. Then there is no non-constant quasi-harmonic spheresuch thatThis generalizes a result of the first author and X. Zhu (Calc. Var., 2009). Our method is essentially the Moser iteration and thus comparatively elementary.