Facial behaviour of analytic functions on the bidisc

Facial behaviour of analytic functions on the bidisc
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bidisc 上分析功能的面部行为

DOI:
10.1112/blms/bdq115
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发表时间:
2011
影响因子:
0.9
通讯作者:
Agler J
Agler J
中科院分区:
数学3区
文献类型:
--
作者:
Agler J

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证明了:若τ是双圆盘D2上以1为界的解析函数,τ是D2的一个面上的点,且τ满足Carathéodory条件,则τ和角梯度τ在该面上都是常数.此外,具有指定的π(τ)和π π(τ)的所有π的类可以用两变量Pick类中的函数参数化。作为一个应用程序,我们解决了插值问题的节点,躺在脸上的bidisc。
We prove that if ϕ is an analytic function bounded by 1 on the bidisc D 2 and τ is a point in a face of D 2 at which ϕ satisfies Carathéodory’s condition, then both ϕ and the angular gradient∇ ϕ exist and are constant on the face. Moreover, the class of all ϕ with prescribed ϕ (τ) and∇ ϕ (τ) can be parametrized in terms of a function in the two-variable Pick class. As an application we solve an interpolation problem with nodes that lie on the faces of the bidisc.
DOI: 10.1007/s00208-011-0650-7
发表时间: 2010-02
影响因子: 1.4
作者:
J. Agler;John E. McCarthy;N. Young
通讯作者: J. Agler;John E. McCarthy;N. Young
DOI: --
发表时间: --
期刊:
影响因子: --
作者:
R. Nevanlinna
通讯作者: R. Nevanlinna