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Mirrors > Home > MPE Home > Th. List > itunifn | Structured version Visualization version GIF version |
Description: Functionality of the iterated union. (Contributed by Stefan O'Rear, 11-Feb-2015.) |
Ref | Expression |
---|---|
ituni.u | ⊢ 𝑈 = (𝑥 ∈ V ↦ (rec((𝑦 ∈ V ↦ ∪ 𝑦), 𝑥) ↾ ω)) |
Ref | Expression |
---|---|
itunifn | ⊢ (𝐴 ∈ 𝑉 → (𝑈‘𝐴) Fn ω) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frfnom 8435 | . 2 ⊢ (rec((𝑦 ∈ V ↦ ∪ 𝑦), 𝐴) ↾ ω) Fn ω | |
2 | ituni.u | . . . 4 ⊢ 𝑈 = (𝑥 ∈ V ↦ (rec((𝑦 ∈ V ↦ ∪ 𝑦), 𝑥) ↾ ω)) | |
3 | 2 | itunifval 10411 | . . 3 ⊢ (𝐴 ∈ 𝑉 → (𝑈‘𝐴) = (rec((𝑦 ∈ V ↦ ∪ 𝑦), 𝐴) ↾ ω)) |
4 | 3 | fneq1d 6643 | . 2 ⊢ (𝐴 ∈ 𝑉 → ((𝑈‘𝐴) Fn ω ↔ (rec((𝑦 ∈ V ↦ ∪ 𝑦), 𝐴) ↾ ω) Fn ω)) |
5 | 1, 4 | mpbiri 258 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝑈‘𝐴) Fn ω) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2107 Vcvv 3475 ∪ cuni 4909 ↦ cmpt 5232 ↾ cres 5679 Fn wfn 6539 ‘cfv 6544 ωcom 7855 reccrdg 8409 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pr 5428 ax-un 7725 ax-inf2 9636 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-ral 3063 df-rex 3072 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-ov 7412 df-om 7856 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 |
This theorem is referenced by: itunisuc 10414 itunitc1 10415 itunitc 10416 ituniiun 10417 hsmexlem5 10425 |
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