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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 22982 | . 2 ⊢ (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ (Base‘𝐾) = ∪ 𝐽)) |
| 4 | 3 | simplbi 500 | 1 ⊢ (𝐾 ∈ TopSp → 𝐽 ∈ Top) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1559 ∈ wcel 2141 ∪ cuni 4862 ‘cfv 6515 Basecbs 17235 TopOpenctopn 17440 Topctop 22940 TopSpctps 22979 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7712 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-iota 6471 df-fun 6517 df-fv 6523 df-top 22941 df-topon 22958 df-topsp 22980 |
| This theorem is referenced by: mreclatdemoBAD 23143 prdstmdd 24171 invrcn 24228 cnextucn 24349 prdsxmslem2 24576 rlmbn 25410 sibfinima 34596 sibfof 34597 rrxtop 46823 |
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