Theorem
The set of integers
is a nowhere dense subset of the set of real numbers![]()
Proof
A subset
of a topological space
is nowhere dense in
if and only if the interior of
is empty:![]()
The set
is closed with empty interior, hence![]()
Theorem
The set of integers
is a nowhere dense subset of the set of real numbers![]()
Proof
A subset
of a topological space
is nowhere dense in
if and only if the interior of
is empty:![]()
The set
is closed with empty interior, hence![]()