# nLab circled set

## Topics in Functional Analysis

A subset $C$ of a vector space $V$ over either $\mathbb{R}$ or $\mathbb{C}$ is circled if $\lambda C \subseteq C$ whenever ${|\lambda|} \le 1$.

Created on May 23, 2013 at 19:52:40. See the history of this page for a list of all contributions to it.