A class of multiplicity free truncated Toeplitz operators

A class of multiplicity free truncated Toeplitz operators
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DOI:
10.1016/j.jmaa.2021.125359
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发表时间:
2021
影响因子:
1.3
通讯作者:
Yufei Li
Yufei Li
中科院分区:
数学3区
文献类型:
--
作者:
Yufei Li

文献摘要

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本文利用交换提升定理刻画了K-θ-2上截断Toeplitz算子与符号zn的交换子。利用这一结果,我们确定了Aznθ何时是无重数的,推广了Douglas和FOIAs[5]的一个结果,解决了Gu[9]的一个猜想。
In this paper, we characterize the commutant of the truncated Toeplitz operator on K θ 2 with symbol z n by the commutant lifting theorem. Using this result we determine when A z n θ is multiplicity free, which generalizes a result of Douglas and Foias [5] and solves a conjecture of Gu [9].