Isolated points of some sets of bounded cosine families, bounded semigroups, and bounded groups on a Banach space

Abstract

We show that if the set of all bounded strongly continuous cosine families on a Banach space $X$ is treated as a metric space under the metric of the uniform convergence associated with the operator norm on the space $\mathcal {L}(X)$ of all bounded linea

Locations

• Studia Mathematica - View - PDF