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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 3434 | . . . . 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 2844 | . . . 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 2735 | 1 ⊢ ((CHOICE ∧ 𝐴 ∈ 𝑉) → AC 𝐴 = V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 Vcvv 3430 dom cdm 5624 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 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-se 5578 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-isom 6501 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1st 7935 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-er 8636 df-map 8768 df-en 8887 df-dom 8888 df-card 9854 df-acn 9857 df-ac 10029 |
| This theorem is referenced by: dfacacn 10055 dfac13 10056 ptcls 23591 dfac14 23593 |
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