# Relatively closed

From Maths

## Definition

A subset [ilmath]A[/ilmath] is **relatively closed in [ilmath]Y[/ilmath]**^{[1]} where [ilmath]Y[/ilmath] is a subspace of the topological space [ilmath](X,\mathcal{J})[/ilmath] if [ilmath]A[/ilmath] is closed in [ilmath]Y[/ilmath]

## See also

## References

- ↑ Introduction to topology - Third Edition - Mendelson