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| Mirrors > Home > ILE Home > Th. List > mopnset | GIF version | ||
| Description: Getting a set by applying MetOpen. (Contributed by Jim Kingdon, 24-Sep-2025.) |
| Ref | Expression |
|---|---|
| mopnset | ⊢ (𝐷 ∈ 𝑉 → (MetOpen‘𝐷) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | blfn 14828 | . . . . . 6 ⊢ ball Fn V | |
| 2 | vex 2818 | . . . . . 6 ⊢ 𝑑 ∈ V | |
| 3 | funfvex 5692 | . . . . . . 7 ⊢ ((Fun ball ∧ 𝑑 ∈ dom ball) → (ball‘𝑑) ∈ V) | |
| 4 | 3 | funfni 5463 | . . . . . 6 ⊢ ((ball Fn V ∧ 𝑑 ∈ V) → (ball‘𝑑) ∈ V) |
| 5 | 1, 2, 4 | mp2an 426 | . . . . 5 ⊢ (ball‘𝑑) ∈ V |
| 6 | 5 | rnex 5030 | . . . 4 ⊢ ran (ball‘𝑑) ∈ V |
| 7 | tgvalex 13563 | . . . 4 ⊢ (ran (ball‘𝑑) ∈ V → (topGen‘ran (ball‘𝑑)) ∈ V) | |
| 8 | 6, 7 | ax-mp 5 | . . 3 ⊢ (topGen‘ran (ball‘𝑑)) ∈ V |
| 9 | 8 | ax-gen 1498 | . 2 ⊢ ∀𝑑(topGen‘ran (ball‘𝑑)) ∈ V |
| 10 | df-mopn 14824 | . . 3 ⊢ MetOpen = (𝑑 ∈ ∪ ran ∞Met ↦ (topGen‘ran (ball‘𝑑))) | |
| 11 | 10 | mptfvex 5768 | . 2 ⊢ ((∀𝑑(topGen‘ran (ball‘𝑑)) ∈ V ∧ 𝐷 ∈ 𝑉) → (MetOpen‘𝐷) ∈ V) |
| 12 | 9, 11 | mpan 424 | 1 ⊢ (𝐷 ∈ 𝑉 → (MetOpen‘𝐷) ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∀wal 1396 ∈ wcel 2205 Vcvv 2815 ∪ cuni 3919 ran crn 4755 Fn wfn 5352 ‘cfv 5357 topGenctg 13554 ∞Metcxmet 14813 ballcbl 14815 MetOpencmopn 14818 |
| 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-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4230 ax-sep 4233 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-cnex 8234 ax-resscn 8235 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-reu 2529 df-rab 2531 df-v 2817 df-sbc 3046 df-csb 3142 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-iun 3998 df-br 4115 df-opab 4177 df-mpt 4178 df-id 4419 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fn 5360 df-f 5361 df-f1 5362 df-fo 5363 df-f1o 5364 df-fv 5365 df-oprab 6062 df-mpo 6063 df-1st 6347 df-2nd 6348 df-pnf 8326 df-mnf 8327 df-xr 8328 df-topgen 13560 df-bl 14823 df-mopn 14824 |
| This theorem is referenced by: cntopex 14831 |
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