arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.07154math.DG
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退化(自旋)曲面的(Dirac-)调和映射的存在性

Existence of (Dirac-)harmonic Maps from Degenerating (Spin) Surfaces

Jürgen Jost, Jingyong Zhu

摘要:

利用Sacks和Uhlenbeck的方法研究了从退化曲面到非正曲流形的调和映射和Dirac-调和映射的存在性。通过从退化为双曲曲面的合适的闭曲面序列中选择合适的$α$ -(Dirac-)调和映射序列,在能量一致有界的假设下,得到了收敛性和一个更清晰的能量恒等式.在该能量恒等式中,在穿孔附近没有能量损失。作为应用,我们得到了退化(自旋)曲面上的(Dirac-)调和映射的存在性结果.如果映射部分的能量也不为零,这是一个必要条件,则极限调和映射和Dirac-调和映射都是非平凡的。

英文摘要:

We study the existence of harmonic maps and Dirac-harmonic maps from degenerating surfaces to non-positive curved manifold via the scheme of Sacks and Uhlenbeck. By choosing a suitable sequence of $α$-(Dirac-)harmonic maps from a sequence of suitable closed surfaces degenerating to a hyperbolic surface, we get the convergence and a cleaner energy identity under the uniformly bounded energy assumption. In this energy identity, there is no energy loss near the punctures. As an application, we obtain an existence result about (Dirac-)harmonic maps from degenerating (spin) surfaces. If the energies of the map parts also stay away from zero, which is a necessary condition, both the limiting harmonic map and Dirac-harmonic map are nontrivial.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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