The Skew Commutators of Toeplitz and Hankel operators in vector-valued Hardy Space

Abstract

In this article, we characterize when a Toeplitz operator and a Hankel operator on the vector-valued Hardy space are skew commutators of each other, and determine necessary and sufficient conditions under which their product is self-adjoint. These characterizations extend the results in \cite{LZD}. In addition, we completely classify the skew commutators of the unilateral shift $S$, its adjoint $S^{\ast }$ and $S\oplus S^{\ast }.$ We also characterize the class of bounded linear operators that have $S$, $S^{\ast }$ and $S\oplus S^{\ast }$ as skew-commutators.

arXiv comment24 pages