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arXiv 0908.1259math.DG
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极小李群同态

Minimal Lie group homomorphisms

A. Caminha

摘要:

设$G_1$和$G_2$是具有双不变度量的李群,$f:G_1\rightarrow G_2$是一个李群同态,它也是一个极小等距浸入.如果$G_1$是紧连通映射,则证明了$G_1$等距于平坦环面或$f$作为调和映射是不稳定的.我们也将这一结果的情况下,$f$是一个紧凑的,连通的李群的李群,以及构造几个例子不稳定的调和映射到正交群的包含。

英文摘要:

Let $G_1$ and $G_2$ be Lie groups furnished with bi-invariant metrics and $f:G_1\rightarrow G_2$ be a Lie group homomorphism which is also a minimal isometric immersion. If $G_1$ is compact and connected, we prove that either $G_1$ is isometric to a flat torus or $f$ is unstable as a harmonic map. We also apply this result to the case in which $f$ is the inclusion of a compact, connected Lie subgroup of a Lie group, as well as to construct several examples of unstable harmonic maps into the orthogonal group.

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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