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arXiv 1111.4981math.DG
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Ricci-平坦锥的稳定性不等式

The stability inequality for Ricci-flat cones

Stuart Hall, Robert Haslhofer, Michael Siepmann

摘要:

本文深入研究了Ricci-平坦锥的稳定性不等式。也许最重要的是,我们证明了CP ^2上的Ricci-平坦锥是稳定的,表明第一个稳定的非平坦Ricci-平坦锥出现在最小的可能维度上。另一方面,我们证明了4-流形上的Ricci平坦锥的许多其他例子是不稳定的,并且爱因斯坦流形的积和h^(1,1)>1的卡勒-爱因斯坦流形上的Ricci平坦锥在维度小于10时是不稳定的。作为独立有趣的结果,我们的计算表明Page度规和Chen-LeBrun-Weber度规是不稳定的Ricci收缩。作为最后的奖励,我们给出了大量的动机,并部分证实了Tom Ilmanen的一个猜想,该猜想涉及到了锥型初始数据下里奇流的非唯一性、正质量定理和泛函。

英文摘要:

In this article, we thoroughly investigate the stability inequality for Ricci-flat cones. Perhaps most importantly, we prove that the Ricci-flat cone over CP^2 is stable, showing that the first stable non-flat Ricci-flat cone occurs in the smallest possible dimension. On the other hand, we prove that many other examples of Ricci-flat cones over 4-manifolds are unstable, and that Ricci-flat cones over products of Einstein manifolds and over Kahler-Einstein manifolds with h^(1,1)>1 are unstable in dimension less than 10. As results of independent interest, our computations indicate that the Page metric and the Chen-LeBrun-Weber metric are unstable Ricci shrinkers. As a final bonus, we give plenty of motivations, and partly confirm a conjecture of Tom Ilmanen relating the lambda-functional, the positive mass theorem and the nonuniqueness of Ricci flow with conical initial data.

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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