数学
乘数(经济学)
线性子空间
张量积
乘法运算符
栏(排版)
乘法(音乐)
球(数学)
不变(物理)
因式分解
纯数学
域代数上的
离散数学
组合数学
数学分析
算法
希尔伯特空间
连接(主束)
几何学
经济
数学物理
宏观经济学
出处
期刊:Acta Mathematica
[Mittag-Leffler Institute]
日期:2023-01-01
卷期号:231 (2): 345-386
被引量:5
标识
DOI:10.4310/acta.2023.v231.n2.a2
摘要
In the theory of complete Pick spaces, the column-row property has appeared in a variety of contexts. We show that it is satisfied by every complete Pick space in the following strong form: each sequence of multipliers that induces a contractive column multiplication operator also induces a contractive row multiplication operator. In combination with known results, this yields a number of consequences. Firstly, we obtain multiple applications to the theory of weak product spaces, including factorization, multipliers and invariant subspaces. Secondly, there is a short proof of the characterization of interpolating sequences in terms of separation and Carleson measure conditions, independent of the solution of the Kadison-Singer problem. Thirdly, we find that in the theory of de Branges-Rovnyak spaces on the ball, the column-extreme multipliers of Jury and Martin are precisely the extreme points of the unit ball of the multiplier algebra.
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