Some developments around the Katznelson-Tzafriri theorem
arXiv:2204.13411 · doi:10.1007/s44146-022-00006-1
Abstract
This paper is a survey article on developments arising from a theorem proved by Katznelson and Tzafriri in 1986 showing that if is a power-bounded operator on a Banach space and $σ(T) \cap \T \subseteq \{1\}$. Many variations and consequences of the original theorem have been proved subsequently, and we provide an account of this branch of operator theory.