Abstract
In this paper we extend the concept of the (N,ฯต)-pseudospectra of Hansen to the case of bounded linear operators on Banach spaces and prove several relations to the usual spectrum. We particularly discuss the approximation by rectangular finite sections and the impact of the fundamental result of Shargorodsky on โjumpingโ pseudospectra.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have