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arXiv math/9905214math.DGmath.AP
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平稳调和映射的梯度估计和爆破分析

Gradient estimates and blow-up analysis for stationary harmonic maps

Fang-Hua Lin

摘要:

对于黎曼流形之间的平稳调和映射,我们给出了内部和边界梯度一致估计的一个充要条件。我们还证明了,如果解析目标流形不携带任何调和S ^2,则平稳映射的奇异集是m \leq n - 4可求长的。这两个结果都来自于对弱收敛平稳调和映射序列的亏损测度和能量集中集的一般分析。

英文摘要:

For stationary harmonic maps between Riemannian manifolds, we provide a necessary and sufficient condition for the uniform interior and boundary gradient estimates in terms of the total energy of maps. We also show that if analytic target manifolds do not carry any harmonic S^2, then the singular sets of stationary maps are m \leq n - 4 rectifiable. Both of these results follow from a general analysis on the defect measures and energy concentration sets associated with a weakly converging sequence of stationary harmonic maps.

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