Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > istopon | Structured version Visualization version GIF version |
Description: Property of being a topology with a given base set. (Contributed by Stefan O'Rear, 31-Jan-2015.) (Revised by Mario Carneiro, 13-Aug-2015.) |
Ref | Expression |
---|---|
istopon | ⊢ (𝐽 ∈ (TopOn‘𝐵) ↔ (𝐽 ∈ Top ∧ 𝐵 = ∪ 𝐽)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elfvex 6703 | . 2 ⊢ (𝐽 ∈ (TopOn‘𝐵) → 𝐵 ∈ V) | |
2 | uniexg 7466 | . . . 4 ⊢ (𝐽 ∈ Top → ∪ 𝐽 ∈ V) | |
3 | eleq1 2900 | . . . 4 ⊢ (𝐵 = ∪ 𝐽 → (𝐵 ∈ V ↔ ∪ 𝐽 ∈ V)) | |
4 | 2, 3 | syl5ibrcom 249 | . . 3 ⊢ (𝐽 ∈ Top → (𝐵 = ∪ 𝐽 → 𝐵 ∈ V)) |
5 | 4 | imp 409 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝐵 = ∪ 𝐽) → 𝐵 ∈ V) |
6 | eqeq1 2825 | . . . . . 6 ⊢ (𝑏 = 𝐵 → (𝑏 = ∪ 𝑗 ↔ 𝐵 = ∪ 𝑗)) | |
7 | 6 | rabbidv 3480 | . . . . 5 ⊢ (𝑏 = 𝐵 → {𝑗 ∈ Top ∣ 𝑏 = ∪ 𝑗} = {𝑗 ∈ Top ∣ 𝐵 = ∪ 𝑗}) |
8 | df-topon 21519 | . . . . 5 ⊢ TopOn = (𝑏 ∈ V ↦ {𝑗 ∈ Top ∣ 𝑏 = ∪ 𝑗}) | |
9 | vpwex 5278 | . . . . . . 7 ⊢ 𝒫 𝑏 ∈ V | |
10 | 9 | pwex 5281 | . . . . . 6 ⊢ 𝒫 𝒫 𝑏 ∈ V |
11 | rabss 4048 | . . . . . . 7 ⊢ ({𝑗 ∈ Top ∣ 𝑏 = ∪ 𝑗} ⊆ 𝒫 𝒫 𝑏 ↔ ∀𝑗 ∈ Top (𝑏 = ∪ 𝑗 → 𝑗 ∈ 𝒫 𝒫 𝑏)) | |
12 | pwuni 4875 | . . . . . . . . . 10 ⊢ 𝑗 ⊆ 𝒫 ∪ 𝑗 | |
13 | pweq 4555 | . . . . . . . . . 10 ⊢ (𝑏 = ∪ 𝑗 → 𝒫 𝑏 = 𝒫 ∪ 𝑗) | |
14 | 12, 13 | sseqtrrid 4020 | . . . . . . . . 9 ⊢ (𝑏 = ∪ 𝑗 → 𝑗 ⊆ 𝒫 𝑏) |
15 | velpw 4544 | . . . . . . . . 9 ⊢ (𝑗 ∈ 𝒫 𝒫 𝑏 ↔ 𝑗 ⊆ 𝒫 𝑏) | |
16 | 14, 15 | sylibr 236 | . . . . . . . 8 ⊢ (𝑏 = ∪ 𝑗 → 𝑗 ∈ 𝒫 𝒫 𝑏) |
17 | 16 | a1i 11 | . . . . . . 7 ⊢ (𝑗 ∈ Top → (𝑏 = ∪ 𝑗 → 𝑗 ∈ 𝒫 𝒫 𝑏)) |
18 | 11, 17 | mprgbir 3153 | . . . . . 6 ⊢ {𝑗 ∈ Top ∣ 𝑏 = ∪ 𝑗} ⊆ 𝒫 𝒫 𝑏 |
19 | 10, 18 | ssexi 5226 | . . . . 5 ⊢ {𝑗 ∈ Top ∣ 𝑏 = ∪ 𝑗} ∈ V |
20 | 7, 8, 19 | fvmpt3i 6773 | . . . 4 ⊢ (𝐵 ∈ V → (TopOn‘𝐵) = {𝑗 ∈ Top ∣ 𝐵 = ∪ 𝑗}) |
21 | 20 | eleq2d 2898 | . . 3 ⊢ (𝐵 ∈ V → (𝐽 ∈ (TopOn‘𝐵) ↔ 𝐽 ∈ {𝑗 ∈ Top ∣ 𝐵 = ∪ 𝑗})) |
22 | unieq 4849 | . . . . 5 ⊢ (𝑗 = 𝐽 → ∪ 𝑗 = ∪ 𝐽) | |
23 | 22 | eqeq2d 2832 | . . . 4 ⊢ (𝑗 = 𝐽 → (𝐵 = ∪ 𝑗 ↔ 𝐵 = ∪ 𝐽)) |
24 | 23 | elrab 3680 | . . 3 ⊢ (𝐽 ∈ {𝑗 ∈ Top ∣ 𝐵 = ∪ 𝑗} ↔ (𝐽 ∈ Top ∧ 𝐵 = ∪ 𝐽)) |
25 | 21, 24 | syl6bb 289 | . 2 ⊢ (𝐵 ∈ V → (𝐽 ∈ (TopOn‘𝐵) ↔ (𝐽 ∈ Top ∧ 𝐵 = ∪ 𝐽))) |
26 | 1, 5, 25 | pm5.21nii 382 | 1 ⊢ (𝐽 ∈ (TopOn‘𝐵) ↔ (𝐽 ∈ Top ∧ 𝐵 = ∪ 𝐽)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 {crab 3142 Vcvv 3494 ⊆ wss 3936 𝒫 cpw 4539 ∪ cuni 4838 ‘cfv 6355 Topctop 21501 TopOnctopon 21518 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-mpt 5147 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-iota 6314 df-fun 6357 df-fv 6363 df-topon 21519 |
This theorem is referenced by: topontop 21521 toponuni 21522 toptopon 21525 toponcom 21536 istps2 21543 tgtopon 21579 distopon 21605 indistopon 21609 fctop 21612 cctop 21614 ppttop 21615 epttop 21617 mretopd 21700 toponmre 21701 resttopon 21769 resttopon2 21776 kgentopon 22146 txtopon 22199 pttopon 22204 xkotopon 22208 qtoptopon 22312 flimtopon 22578 fclstopon 22620 fclsfnflim 22635 utoptopon 22845 qtopt1 31099 neibastop1 33707 onsuctopon 33782 rfcnpre1 41296 cnfex 41305 icccncfext 42190 stoweidlem47 42352 |
Copyright terms: Public domain | W3C validator |