| Mathbox for Jeff Hankins |
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Related theorems GIF version |
| Description: A normal space is a topological space. |
| Ref | Expression |
|---|---|
| nrmtop | ⊢ (J ∈ Nrm → J ∈ Top) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isnrm 11612 | . 2 ⊢ (J ∈ Nrm ↔ (J ∈ Top ⋀ ∀c ∈ (Clsd ‘J)∀d ∈ (Clsd ‘J)((c ∩ d) = ∅ → ∃o ∈ J ∃p ∈ J (c ⊆ o ⋀ d ⊆ p ⋀ (o ∩ p) = ∅)))) | |
| 2 | 1 | pm3.26bi 320 | 1 ⊢ (J ∈ Nrm → J ∈ Top) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ⋀ w3a 781 = wceq 992 ∈ wcel 994 ∀wral 1691 ∃wrex 1692 ∩ cin 2098 ⊆ wss 2099 ∅c0 2332 ‘cfv 3263 Topctop 7800 Clsdccld 7870 Nrmcnrm 11595 |
| This theorem is referenced by: nrmsep2 11616 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-8 1000 ax-10 1002 ax-11 1003 ax-12 1004 ax-13 1005 ax-14 1006 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-10o 1177 ax-16 1247 ax-11o 1255 ax-ext 1500 ax-sep 2777 ax-pow 2818 ax-pr 2855 |
| This theorem depends on definitions: df-bi 145 df-or 222 df-an 223 df-ex 1017 df-sb 1209 df-eu 1421 df-mo 1422 df-clab 1506 df-cleq 1511 df-clel 1514 df-ne 1630 df-ral 1695 df-rex 1696 df-rab 1698 df-v 1858 df-dif 2101 df-un 2102 df-in 2103 df-ss 2105 df-nul 2333 df-pw 2459 df-sn 2470 df-pr 2471 df-op 2474 df-uni 2570 df-br 2693 df-opab 2741 df-xp 3265 df-cnv 3267 df-dm 3269 df-rn 3270 df-res 3271 df-ima 3272 df-fv 3279 df-nrm 11598 |