I've been trying for forever to come up with a counterexample but haven't had any luck.
Tell me more
×
Mathematics Stack Exchange is a question and answer site for
people studying math at any level and professionals in related fields. It's 100% free, no registration required.
|
|
The Sierpinski Two-Point Space is connected and first countable, but not Hausdorff (indeed, not even $T_1$). |
|||
|
|
|
Another example: the cofinite topology on the integers is $T_1$, second countable (so first countable), connected and very non-Hausdorff for the same reason: all non-empty open sets intersect. |
|||
|
|
