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arXiv 0709.1490math.DGmath.CVmath.DS
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Kahler类上的Ricci迭代

Ricci iterations on Kahler classes

Julien Keller

摘要:

本文考虑Kähler度量空间上Ricci算子所涉及的动力系统。A. Nadel对Fano流形定义了一个由Ricci算子给出的迭代格式,并提出了它是否存在非平凡周期点的问题。首先,我们证明不可能存在这样的周期点。我们定义了Ricci算子的逆算子,并考虑其迭代在Fano Kähler-Einstein流形上的动力学行为。特别地,我们证明了迭代收敛到复曲面流形上的Kähler-Ricci孤子。最后,我们定义了一个有限维的过程,给出了一个近似的Kähler-Einstein度规使用这个迭代过程,并将其应用于$\mathbb{CP}^2$吹成3点。

英文摘要:

In this paper we consider the dynamical system involved by the Ricci operator on the space of Kähler metrics. A. Nadel has defined an iteration scheme given by the Ricci operator for Fano manifold and asked whether it has some nontrivial periodic points. First, we prove that no such periodic points can exist. We define the inverse of the Ricci operator and consider the dynamical behaviour of its iterates for a Fano Kähler-Einstein manifold. In particular we show that the iterates do converge to the existing Kähler-Ricci soliton on a toric manifold. Finally, we define a finite dimensional procedure to give an approximation of Kähler-Einstein metrics using this iterative procedure and apply it for $\mathbb{CP}^2$ blown up in 3 points.

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