Solution
= Solution
{c}
A <Hausdorff space> is one in which any distinct points $x,y$ have disjoint open neighborhoods: there exist open sets $U,V$ with $x\in U$, $y\in V$ and $U\cap V=\varnothing$.
= Solution
{c}
A <Hausdorff space> is one in which any distinct points $x,y$ have disjoint open neighborhoods: there exist open sets $U,V$ with $x\in U$, $y\in V$ and $U\cap V=\varnothing$.