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Mirrors > Home > MPE Home > Th. List > ac6s2 | Structured version Visualization version GIF version |
Description: Generalization of the Axiom of Choice to classes. Slightly strengthened version of ac6s3 10243. (Contributed by NM, 29-Sep-2006.) |
Ref | Expression |
---|---|
ac6s.1 | ⊢ 𝐴 ∈ V |
ac6s.2 | ⊢ (𝑦 = (𝑓‘𝑥) → (𝜑 ↔ 𝜓)) |
Ref | Expression |
---|---|
ac6s2 | ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦𝜑 → ∃𝑓(𝑓 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 𝜓)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rexv 3457 | . . 3 ⊢ (∃𝑦 ∈ V 𝜑 ↔ ∃𝑦𝜑) | |
2 | 1 | ralbii 3092 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦 ∈ V 𝜑 ↔ ∀𝑥 ∈ 𝐴 ∃𝑦𝜑) |
3 | ac6s.1 | . . . 4 ⊢ 𝐴 ∈ V | |
4 | ac6s.2 | . . . 4 ⊢ (𝑦 = (𝑓‘𝑥) → (𝜑 ↔ 𝜓)) | |
5 | 3, 4 | ac6s 10240 | . . 3 ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦 ∈ V 𝜑 → ∃𝑓(𝑓:𝐴⟶V ∧ ∀𝑥 ∈ 𝐴 𝜓)) |
6 | ffn 6600 | . . . . 5 ⊢ (𝑓:𝐴⟶V → 𝑓 Fn 𝐴) | |
7 | 6 | anim1i 615 | . . . 4 ⊢ ((𝑓:𝐴⟶V ∧ ∀𝑥 ∈ 𝐴 𝜓) → (𝑓 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 𝜓)) |
8 | 7 | eximi 1837 | . . 3 ⊢ (∃𝑓(𝑓:𝐴⟶V ∧ ∀𝑥 ∈ 𝐴 𝜓) → ∃𝑓(𝑓 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 𝜓)) |
9 | 5, 8 | syl 17 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦 ∈ V 𝜑 → ∃𝑓(𝑓 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 𝜓)) |
10 | 2, 9 | sylbir 234 | 1 ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦𝜑 → ∃𝑓(𝑓 Fn 𝐴 ∧ ∀𝑥 ∈ 𝐴 𝜓)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1539 ∃wex 1782 ∈ wcel 2106 ∀wral 3064 ∃wrex 3065 Vcvv 3432 Fn wfn 6428 ⟶wf 6429 ‘cfv 6433 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-reg 9351 ax-inf2 9399 ax-ac2 10219 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-iin 4927 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-om 7713 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-en 8734 df-r1 9522 df-rank 9523 df-card 9697 df-ac 9872 |
This theorem is referenced by: ac6s3 10243 ac6s4 10246 ptpconn 33195 ctbssinf 35577 |
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