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arXiv 1002.3717math.DGmath.CV
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相对Kahler-里奇流及其量子化

Relative Kahler-Ricci flows and their quantization

Robert J. Berman

摘要:

设X是基S上纤维化的复流形,L是X上相对充裕的线丛.在L上的所有具有相对正曲率的Hermitian度量空间上定义了相对Kahler-里奇流.主要研究了三种不同的情况:纤维是Calabi-Yau流形的情况和L是相对(反)正则线丛的情况。研究的主要主题是家庭的积极性是否被保存下的流量和它的关系的变化的模量的复结构的纤维。这种设置的量子化也进行了研究,其中的Kahler-Ricci流的作用是发挥唐纳森的迭代空间上的有限秩向量丛上的所有Hermitian度量定义为纤维化引起的第零个直接图像。给出了在相对正则碰撞和Weil-Petersson几何上构造正则度量的应用。一些主要的结果是一个抛物型模拟最近的椭圆方程的Schumacher和收敛到凯勒-里奇流的唐纳森迭代在一定的双标度限制。

英文摘要:

Let X be a complex manifold fibered over the base S and let L be a relatively ample line bundle over X. We define relative Kahler-Ricci flows on the space of all Hermitian metrics on L with relatively positive curvature. Mainly three different settings are investigated: the case when the fibers are Calabi-Yau manifolds and the case when L is the relative (anti-) canonical line bundle. The main theme studied is whether posivity in families is preserved under the flows and its relation to the variation of the moduli of the complex structures of the fibres. The quantization of this setting is also studied, where the role of the Kahler-Ricci flow is played by Donaldson's iteration on the space of all Hermitian metrics on the finite rank vector bundle over S defined as the zeroth direct image induced by the fibration. Applications to the construction of canonical metrics on relative canonical bumdles and Weil-Petersson geometry are given. Some of the main results are a parabolic analogue of a recent elliptic equation of Schumacher and the convergence towards the Kähler-Ricci flow of Donaldson's iteration in a certain double scaling limit.

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