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| Description: Our Axiom of Choice (in the form of ac3 4747) implies the Axiom of Choice (first form) of [Enderton] p. 49. The proof uses neither AC nor the Axiom of Regularity. See aceq6b 4742 for the converse (which does use the Axiom of Regularity). |
| Ref | Expression |
|---|---|
| aceq6a |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq2 1535 |
. . . . . . . . . . . . . 14
| |
| 2 | eleq1 1534 |
. . . . . . . . . . . . . . . 16
| |
| 3 | 2 | anbi1d 617 |
. . . . . . . . . . . . . . 15
|
| 4 | 3 | rexbidv 1664 |
. . . . . . . . . . . . . 14
|
| 5 | 1, 4 | anbi12d 628 |
. . . . . . . . . . . . 13
|
| 6 | 5 | abbidv 1577 |
. . . . . . . . . . . 12
|
| 7 | df-rab 1652 |
. . . . . . . . . . . 12
| |
| 8 | df-rab 1652 |
. . . . . . . . . . . 12
| |
| 9 | 6, 7, 8 | 3eqtr4g 1531 |
. . . . . . . . . . 11
|
| 10 | 9 | unieqd 2512 |
. . . . . . . . . 10
|
| 11 | eqid 1475 |
. . . . . . . . . 10
| |
| 12 | visset 1813 |
. . . . . . . . . . . 12
| |
| 13 | 12 | rabex 2725 |
. . . . . . . . . . 11
|
| 14 | 13 | uniex 2870 |
. . . . . . . . . 10
|
| 15 | 10, 11, 14 | fvopab4 3780 |
. . . . . . . . 9
|
| 16 | 15 | eleq1d 1540 |
. . . . . . . 8
|
| 17 | reucl 2885 |
. . . . . . . 8
| |
| 18 | 16, 17 | syl5bir 210 |
. . . . . . 7
|
| 19 | 18 | imim2d 25 |
. . . . . 6
|
| 20 | 19 | r19.20i 1704 |
. . . . 5
|
| 21 | visset 1813 |
. . . . . . 7
| |
| 22 | 21 | opabex2 3610 |
. . . . . 6
|
| 23 | fveq1 3723 |
. . . . . . . . 9
| |
| 24 | 23 | eleq1d 1540 |
. . . . . . . 8
|
| 25 | 24 | imbi2d 612 |
. . . . . . 7
|
| 26 | 25 | ralbidv 1663 |
. . . . . 6
|
| 27 | 22, 26 | cla4ev 1869 |
. . . . 5
|
| 28 | 20, 27 | syl 10 |
. . . 4
|
| 29 | 28 | 19.23aiv 1295 |
. . 3
|
| 30 | 29 | 19.20i 992 |
. 2
|
| 31 | aceq3 4733 |
. 2
| |
| 32 | 30, 31 | sylibr 200 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: aceq7 4743 ac7 4748 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-9 965 ax-10 966 ax-11 967 ax-12 968 ax-13 969 ax-14 970 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-rep 2693 ax-sep 2703 ax-pow 2742 ax-pr 2779 ax-un 2866 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 df-ral 1649 df-rex 1650 df-reu 1651 df-rab 1652 df-v 1812 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-pw 2402 df-sn 2412 df-pr 2413 df-op 2416 df-uni 2504 df-br 2620 df-opab 2667 df-id 2835 df-xp 3184 df-rel 3185 df-cnv 3186 df-co 3187 df-dm 3188 df-rn 3189 df-res 3190 df-ima 3191 df-fun 3192 df-fn 3193 df-fv 3198 |