The essential spectrum of canonical systems
Spectral Theory
2019-08-07 v1 Mathematical Physics
math.MP
Abstract
We study the minimum of the essential spectrum of canonical systems . Our results can be described as a generalized and more quantitative version of the characterization of systems with purely discrete spectrum, which was recently obtained by Romanov and Woracek [6]. Our key tool is oscillation theory.
Cite
@article{arxiv.1908.02266,
title = {The essential spectrum of canonical systems},
author = {Christian Remling and Kyle Scarbrough},
journal= {arXiv preprint arXiv:1908.02266},
year = {2019}
}