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arXiv math/0602090math.DG
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关于Perelman $\mathcal{L}$ -长度的Morse指标定理的注记

A note on Morse's index theorem for Perelman's $\mathcal{L}$-length

Hong Huang

摘要:

这基本上是一个说明第7节佩雷尔曼的第一篇论文的里奇流。给出了Perelman $ \mathcal{L} $ -长度的指数形式的一些基本性质,这些性质类似于Riemann情形(度量固定)的指数形式,并观察到Perelman $\mathcal{L}$ -长度的Morse指数定理成立.作为推论,我们得到了有限$\mathcal{L}$ -测地线上的$\mathcal{L}$ -共轭点个数的有限性.

英文摘要:

This is essentially a note on Section 7 of Perelman's first paper on Ricci flow. We list some basic properties of the index form for Perelman's $ \mathcal{L} $-length, which are analogous to the ones in Riemannian case (with fixed metric), and observe that Morse's index theorem for Perelman's $\mathcal{L}$-length holds. As a corollary we get the finiteness of the number of the $\mathcal{L}$-conjugate points along a finite $\mathcal{L}$-geodesic.

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