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| Mirrors > Home > MPE Home > Th. List > acacni | Structured version Visualization version GIF version | ||
| Description: A choice equivalent: every set has choice sets of every length. (Contributed by Mario Carneiro, 31-Aug-2015.) |
| Ref | Expression |
|---|---|
| acacni | ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → AC 𝐴 = V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpr 484 | . . . 4 ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉) | |
| 2 | vex 3442 | . . . . 5 ⊢ 𝑥 ∈ V | |
| 3 | simpl 482 | . . . . . 6 ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → CHOICE) | |
| 4 | dfac10 10051 | . . . . . 6 ⊢ (CHOICE ↔ dom card = V) | |
| 5 | 3, 4 | sylib 218 | . . . . 5 ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → dom card = V) |
| 6 | 2, 5 | eleqtrrid 2835 | . . . 4 ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → 𝑥 ∈ dom card) |
| 7 | numacn 9962 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (𝑥 ∈ dom card → 𝑥 ∈ AC 𝐴)) | |
| 8 | 1, 6, 7 | sylc 65 | . . 3 ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → 𝑥 ∈ AC 𝐴) |
| 9 | 2 | a1i 11 | . . 3 ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → 𝑥 ∈ V) |
| 10 | 8, 9 | 2thd 265 | . 2 ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → (𝑥 ∈ AC 𝐴 ↔ 𝑥 ∈ V)) |
| 11 | 10 | eqrdv 2727 | 1 ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → AC 𝐴 = V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 Vcvv 3438 dom cdm 5623 cardccrd 9850 AC wacn 9853 CHOICEwac 10028 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7675 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rmo 3345 df-reu 3346 df-rab 3397 df-v 3440 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-int 4900 df-iun 4946 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-se 5577 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-pred 6253 df-ord 6314 df-on 6315 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-isom 6495 df-riota 7310 df-ov 7356 df-oprab 7357 df-mpo 7358 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-er 8632 df-map 8762 df-en 8880 df-dom 8881 df-card 9854 df-acn 9857 df-ac 10029 |
| This theorem is referenced by: dfacacn 10055 dfac13 10056 ptcls 23519 dfac14 23521 |
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