| Mathbox for Giovanni Mascellani |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > ac6s3f | Structured version Visualization version GIF version | ||
| Description: Generalization of the Axiom of Choice to classes, with bound-variable hypothesis. (Contributed by Giovanni Mascellani, 19-Aug-2018.) |
| Ref | Expression |
|---|---|
| ac6s3f.1 | ⊢ Ⅎ𝑦𝜓 |
| ac6s3f.2 | ⊢ 𝐴 ∈ V |
| ac6s3f.3 | ⊢ (𝑦 = (𝑓‘𝑥) → (𝜑 ↔ 𝜓)) |
| Ref | Expression |
|---|---|
| ac6s3f | ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦𝜑 → ∃𝑓∀𝑥 ∈ 𝐴 𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rexv 3490 | . . . 4 ⊢ (∃𝑦 ∈ V 𝜑 ↔ ∃𝑦𝜑) | |
| 2 | 1 | ralbii 3117 | . . 3 ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦 ∈ V 𝜑 ↔ ∀𝑥 ∈ 𝐴 ∃𝑦𝜑) |
| 3 | 2 | biimpri 231 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦𝜑 → ∀𝑥 ∈ 𝐴 ∃𝑦 ∈ V 𝜑) |
| 4 | ac6s3f.1 | . . 3 ⊢ Ⅎ𝑦𝜓 | |
| 5 | ac6s3f.2 | . . 3 ⊢ 𝐴 ∈ V | |
| 6 | ac6s3f.3 | . . 3 ⊢ (𝑦 = (𝑓‘𝑥) → (𝜑 ↔ 𝜓)) | |
| 7 | 4, 5, 6 | ac6sf 10469 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦 ∈ V 𝜑 → ∃𝑓(𝑓:𝐴⟶V ∧ ∀𝑥 ∈ 𝐴 𝜓)) |
| 8 | exsimpr 1896 | . 2 ⊢ (∃𝑓(𝑓:𝐴⟶V ∧ ∀𝑥 ∈ 𝐴 𝜓) → ∃𝑓∀𝑥 ∈ 𝐴 𝜓) | |
| 9 | 3, 7, 8 | 3syl 19 | 1 ⊢ (∀𝑥 ∈ 𝐴 ∃𝑦𝜑 → ∃𝑓∀𝑥 ∈ 𝐴 𝜓) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 ∃wex 1806 Ⅎwnf 1810 ∈ wcel 2149 ∀wral 3085 ∃wrex 3095 Vcvv 3463 ⟶wf 6529 ‘cfv 6533 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5239 ax-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 ax-reg 9550 ax-inf2 9606 ax-ac2 10443 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-int 4914 df-iun 4959 df-iin 4960 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-se 5613 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-isom 6542 df-riota 7365 df-ov 7411 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-en 8940 df-r1 9732 df-rank 9733 df-card 9921 df-ac 10096 |
| This theorem is referenced by: ac6s6 38706 |
| Copyright terms: Public domain | W3C validator |