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| Mirrors > Home > MPE Home > Th. List > tpstop | Structured version Visualization version GIF version | ||
| Description: The topology extractor on a topological space is a topology. (Contributed by FL, 27-Jun-2014.) |
| Ref | Expression |
|---|---|
| tpstop.j | ⊢ 𝐽 = (TopOpen‘𝐾) |
| Ref | Expression |
|---|---|
| tpstop | ⊢ (𝐾 ∈ TopSp → 𝐽 ∈ Top) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2761 | . . 3 ⊢ (Base‘𝐾) = (Base‘𝐾) | |
| 2 | tpstop.j | . . 3 ⊢ 𝐽 = (TopOpen‘𝐾) | |
| 3 | 1, 2 | istps2 23233 | . 2 ⊢ (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ (Base‘𝐾) = ∪ 𝐽)) |
| 4 | 3 | simplbi 502 | 1 ⊢ (𝐾 ∈ TopSp → 𝐽 ∈ Top) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ∪ cuni 4867 ‘cfv 6531 Basecbs 17367 TopOpenctopn 17572 Topctop 23191 TopSpctps 23230 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-iota 6487 df-fun 6533 df-fv 6539 df-top 23192 df-topon 23209 df-topsp 23231 |
| This theorem is used by: mreclatdemoBAD 23394 prdstmdd 24423 invrcn 24480 cnextucn 24601 prdsxmslem2 24828 rlmbn 25662 sibfinima 34954 sibfof 34955 rrxtop 47243 |
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