A short proof of the zero-two law for cosine functions
Functional Analysis
2015-05-25 v1
Abstract
Let (C(t))\in\mathbb{R}} be a cosine function in a unital Banach algebra. We give a simple proof of the fact that if lim sup then
Cite
@article{arxiv.1505.06065,
title = {A short proof of the zero-two law for cosine functions},
author = {Jean Esterle},
journal= {arXiv preprint arXiv:1505.06065},
year = {2015}
}