I was wondering what can be said about the interior of $\{{4}\}$, the empty set?
The interior of a set $A$ is the largest open set contained by $A$. Hence, if the set at hand is a singleton, then isn't the interior of the singleton the empty set?
I was wondering what can be said about the interior of $\{{4}\}$, the empty set?
The interior of a set $A$ is the largest open set contained by $A$. Hence, if the set at hand is a singleton, then isn't the interior of the singleton the empty set?