Name: Anonymous 2024-05-07 7:42
A point a is said to be interior to a set A if there exists ε > 0 such that (a-ε,a+ε) is a subset of A.
The set of all points that are interior to A is called the interior of A and denoted int A.
A set A is said to be open if A = int A.
The set of all points that are interior to A is called the interior of A and denoted int A.
A set A is said to be open if A = int A.