Symbols of truncated Toeplitz operators

Details Symbols of truncated Toeplitz operators Symbols of truncated Toeplitz operators

2010-09-26

arxiv.org/abs/1009.5123v1

Journal of Functional Analysis, 261 (2011), 12, 3437-3456

Mathematics

Functional Analysis

19 pages

Scientific paper

We consider three problems connected with coinvariant subspaces of the backward shift operator in Hardy spaces $H^p$: 1) properties of truncated Toeplitz operators; 2) Carleson-type embedding theorems for the coinvariant subspaces; 3) factorizations of pseudocontinuable functions from $H^1$. These problems turn out to be closely connected and even, in a sense, equivalent. The new approach based on the factorizations allows us to answer a number of challenging questions about truncated Toeplitz operators posed by Donald Sarason.

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