Cofinite topology
= Cofinite topology
{wiki}
The cofinite topology on a set $X$ consists of the empty set together with every subset whose complement is finite. On an infinite set, any two nonempty open sets intersect.
= Cofinite topology
{wiki}
The cofinite topology on a set $X$ consists of the empty set together with every subset whose complement is finite. On an infinite set, any two nonempty open sets intersect.