Description: A perfectly normal space is a topological space. (Contributed by Mario Carneiro, 26-Aug-2015)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | pnrmtop | ⊢ ( 𝐽 ∈ PNrm → 𝐽 ∈ Top ) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | pnrmnrm | ⊢ ( 𝐽 ∈ PNrm → 𝐽 ∈ Nrm ) | |
| 2 | nrmtop | ⊢ ( 𝐽 ∈ Nrm → 𝐽 ∈ Top ) | |
| 3 | 1 2 | syl | ⊢ ( 𝐽 ∈ PNrm → 𝐽 ∈ Top ) |