Green函数与Lempert函数:一个最小的例子
Green vs. Lempert functions: a minimal example
摘要:
通过在所有经过极点和点$z$的解析圆盘上取一定的下确界,得到了在点$z$处的$\mathbb C^n$域中极点集合的Lempert函数,并优化了相应的多极复格林函数.科曼证明,这两个重合的情况下,集的两极在单位球。我们给出了一个例子,一组三个极点的单位球,这种平等失败。
英文摘要:
The Lempert function for a set of poles in a domain of $\mathbb C^n$ at a point $z$ is obtained by taking a certain infimum over all analytic disks going through the poles and the point $z$, and majorizes the corresponding multi-pole pluricomplex Green function. Coman proved that both coincide in the case of sets of two poles in the unit ball. We give an example of a set of three poles in the unit ball where this equality fails.
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