# derived set

Let $X$ be a topological space and let $A$ be a subset of $X$. The derived set $A^{\prime}$ of $A$ is the set of all limit points of $A$ in $X$ [1].

## References

• 1 J.L. Kelley, General Topology, D. van Nostrand Company, Inc., 1955.
Title derived set DerivedSet 2013-03-22 13:35:06 2013-03-22 13:35:06 bwebste (988) bwebste (988) 7 bwebste (988) Definition msc 54-00 CantorBendixsonDerivative