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arXiv 1207.4010math.CV
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有限Blaschke积作为其他有限Blaschke积的合成

Finite Blaschke Products as Compositions of Other Finite Blaschke Products

Carl C. Cowen

摘要:

这些注释回答了这样一个问题:“什么时候有限Blaschke积$B$可以写成两个有限Blaschke积$B_1$和$B_2$的合成,即$B=B_1\circ B_2$,以非平凡的方式,也就是说,其中每个的阶大于1。“它表明,一个组可以计算从$B$和它的局部逆,组成因子分解对应于这个组的正规子群。这份手稿写于1974年,但没有出版,因为它指出,作者认为,这主要是重建工作的里特从1922年和1923年,谁报告的工作多项式。这是公开现在,因为最近的兴趣,这一主题的几个数学家感兴趣的不同方面的问题,并有兴趣将这些想法,复分析和算子理论。

英文摘要:

These notes answer the question "When can a finite Blaschke product $B$ be written as a composition of two finite Blaschke products $B_1$ and $B_2$, that is, $B=B_1\circ B_2$, in a non-trivial way, that is, where the order of each is greater than 1." It is shown that a group can be computed from $B$ and its local inverses, and that compositional factorizations correspond to normal subgroups of this group. This manuscript was written in 1974 but not published because it was pointed out to the author that this was primarily a reconstruction of work of Ritt from 1922 and 1923, who reported on work on polynomials. It is being made public now because of recent interest in this subject by several mathematicians interested in different aspects of the problem and interested in applying these ideas to complex analysis and operator theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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