This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Description: A perfectly normal space is a topological space. (Contributed by Mario Carneiro, 26-Aug-2015)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | pnrmtop |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pnrmnrm | ||
| 2 | nrmtop | ||
| 3 | 1 2 | syl |