\begin{definition}[Definition:Set of Condensation Points]
Let $T = \left({S, \tau}\right)$ be a topological space.
Let $A$ be a subset of $S$.
The '''set of condensation points''' of $A$ is the set of all condensation points of $A$,
:$A^0 = \left\{{x \in S:x}\right.$ is condensation point of $\left.{A}\right\}$
\end{definition}