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arXiv 2107.09115math.FA
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紧截断Toeplitz算子的符号

Symbols of compact truncated Toeplitz operators

Ryan O'Loughlin

摘要:

本文刻画了模型空间$K_I^1$的对偶,其中$I$是一个内函数,它与移位的Hardy空间$z H^1$是同构的.利用这个对偶结果,证明了模型空间$K_I^2$上的每个有界截断Toeplitz算子都有有界符号当且仅当$K_I^2$上的每个紧致截断Toeplitz算子都有一个符号,其形式为$I$乘以一个连续函数.

英文摘要:

This paper characterises the dual of the model space $K_I^1$, where $I$ is an inner function, intersected with the shifted Hardy space, $z H^1$. With this duality result, it is then shown that every bounded truncated Toeplitz operator on the model space $K_I^2$ has a bounded symbol if and only if every compact truncated Toeplitz operator on $K_I^2$ has a symbol which is of the form $I$ multiplied by a continuous function.

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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