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| Mirrors > Home > ILE Home > Th. List > topnidg | GIF version | ||
| Description: Value of the topology extractor function when the topology is defined over the same set as the base. (Contributed by Mario Carneiro, 13-Aug-2015.) |
| Ref | Expression |
|---|---|
| topnval.1 | ⊢ 𝐵 = (Base‘𝑊) |
| topnval.2 | ⊢ 𝐽 = (TopSet‘𝑊) |
| Ref | Expression |
|---|---|
| topnidg | ⊢ ((𝑊 ∈ 𝑉 ∧ 𝐽 ⊆ 𝒫 𝐵) → 𝐽 = (TopOpen‘𝑊)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | topnval.1 | . . . 4 ⊢ 𝐵 = (Base‘𝑊) | |
| 2 | baseslid 13388 | . . . . 5 ⊢ (Base = Slot (Base‘ndx) ∧ (Base‘ndx) ∈ ℕ) | |
| 3 | 2 | slotex 13357 | . . . 4 ⊢ (𝑊 ∈ 𝑉 → (Base‘𝑊) ∈ V) |
| 4 | 1, 3 | eqeltrid 2325 | . . 3 ⊢ (𝑊 ∈ 𝑉 → 𝐵 ∈ V) |
| 5 | restid2 13579 | . . 3 ⊢ ((𝐵 ∈ V ∧ 𝐽 ⊆ 𝒫 𝐵) → (𝐽 ↾t 𝐵) = 𝐽) | |
| 6 | 4, 5 | sylan 283 | . 2 ⊢ ((𝑊 ∈ 𝑉 ∧ 𝐽 ⊆ 𝒫 𝐵) → (𝐽 ↾t 𝐵) = 𝐽) |
| 7 | topnval.2 | . . . 4 ⊢ 𝐽 = (TopSet‘𝑊) | |
| 8 | 1, 7 | topnvalg 13582 | . . 3 ⊢ (𝑊 ∈ 𝑉 → (𝐽 ↾t 𝐵) = (TopOpen‘𝑊)) |
| 9 | 8 | adantr 276 | . 2 ⊢ ((𝑊 ∈ 𝑉 ∧ 𝐽 ⊆ 𝒫 𝐵) → (𝐽 ↾t 𝐵) = (TopOpen‘𝑊)) |
| 10 | 6, 9 | eqtr3d 2273 | 1 ⊢ ((𝑊 ∈ 𝑉 ∧ 𝐽 ⊆ 𝒫 𝐵) → 𝐽 = (TopOpen‘𝑊)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1402 ∈ wcel 2209 Vcvv 2821 ⊆ wss 3220 𝒫 cpw 3685 ‘cfv 5372 (class class class)co 6075 Basecbs 13330 TopSetcts 13414 ↾t crest 13570 TopOpenctopn 13571 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4241 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 ax-setind 4679 ax-cnex 8260 ax-resscn 8261 ax-1re 8263 ax-addrcl 8266 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-int 3966 df-iun 4009 df-br 4126 df-opab 4188 df-mpt 4189 df-id 4433 df-xp 4775 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-rn 4780 df-res 4781 df-ima 4782 df-iota 5332 df-fun 5374 df-fn 5375 df-f 5376 df-f1 5377 df-fo 5378 df-f1o 5379 df-fv 5380 df-ov 6078 df-oprab 6079 df-mpo 6080 df-1st 6364 df-2nd 6365 df-inn 9284 df-2 9342 df-3 9343 df-4 9344 df-5 9345 df-6 9346 df-7 9347 df-8 9348 df-9 9349 df-ndx 13333 df-slot 13334 df-base 13336 df-tset 13427 df-rest 13572 df-topn 13573 |
| This theorem is referenced by: topontopn 15061 |
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