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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 2762 | . . 3 ⊢ (Base‘𝐾) = (Base‘𝐾) | |
| 2 | tpstop.j | . . 3 ⊢ 𝐽 = (TopOpen‘𝐾) | |
| 3 | 1, 2 | istps2 23166 | . 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 4870 ‘cfv 6537 Basecbs 17307 TopOpenctopn 17512 Topctop 23124 TopSpctps 23163 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-iota 6493 df-fun 6539 df-fv 6545 df-top 23125 df-topon 23142 df-topsp 23164 |
| This theorem is used by: mreclatdemoBAD 23327 prdstmdd 24356 invrcn 24413 cnextucn 24534 prdsxmslem2 24761 rlmbn 25595 sibfinima 34858 sibfof 34859 rrxtop 47125 |
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