\begin{definition}[Definition:Character of Topological Space]
Let $T$ be a topological space.
The '''character of (the topological space) $T$''' is the supremum of the set of characters of the points of $T$:
:$\chi \left({T}\right) := \sup \left\{ {\chi \left({x, T}\right): x \in T}\right\}$
\end{definition}