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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 14589 | . . . . . 6 ⊢ ball Fn V | |
| 2 | vex 2804 | . . . . . 6 ⊢ 𝑑 ∈ V | |
| 3 | funfvex 5659 | . . . . . . 7 ⊢ ((Fun ball ∧ 𝑑 ∈ dom ball) → (ball‘𝑑) ∈ V) | |
| 4 | 3 | funfni 5434 | . . . . . 6 ⊢ ((ball Fn V ∧ 𝑑 ∈ V) → (ball‘𝑑) ∈ V) |
| 5 | 1, 2, 4 | mp2an 426 | . . . . 5 ⊢ (ball‘𝑑) ∈ V |
| 6 | 5 | rnex 5002 | . . . 4 ⊢ ran (ball‘𝑑) ∈ V |
| 7 | tgvalex 13369 | . . . 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 1497 | . 2 ⊢ ∀𝑑(topGen‘ran (ball‘𝑑)) ∈ V |
| 10 | df-mopn 14585 | . . 3 ⊢ MetOpen = (𝑑 ∈ ∪ ran ∞Met ↦ (topGen‘ran (ball‘𝑑))) | |
| 11 | 10 | mptfvex 5735 | . 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 1395 ∈ wcel 2201 Vcvv 2801 ∪ cuni 3894 ran crn 4728 Fn wfn 5323 ‘cfv 5328 topGenctg 13360 ∞Metcxmet 14574 ballcbl 14576 MetOpencmopn 14579 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2203 ax-14 2204 ax-ext 2212 ax-coll 4205 ax-sep 4208 ax-pow 4266 ax-pr 4301 ax-un 4532 ax-cnex 8128 ax-resscn 8129 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ral 2514 df-rex 2515 df-reu 2516 df-rab 2518 df-v 2803 df-sbc 3031 df-csb 3127 df-un 3203 df-in 3205 df-ss 3212 df-pw 3655 df-sn 3676 df-pr 3677 df-op 3679 df-uni 3895 df-iun 3973 df-br 4090 df-opab 4152 df-mpt 4153 df-id 4392 df-xp 4733 df-rel 4734 df-cnv 4735 df-co 4736 df-dm 4737 df-rn 4738 df-res 4739 df-ima 4740 df-iota 5288 df-fun 5330 df-fn 5331 df-f 5332 df-f1 5333 df-fo 5334 df-f1o 5335 df-fv 5336 df-oprab 6027 df-mpo 6028 df-1st 6308 df-2nd 6309 df-pnf 8221 df-mnf 8222 df-xr 8223 df-topgen 13366 df-bl 14584 df-mopn 14585 |
| This theorem is referenced by: cntopex 14592 |
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