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| Description: Our Axiom of Choice (in the form of ac3 4671) implies the Axiom of Choice (first form) of [Enderton] p. 49. The proof uses neither AC nor the Axiom of Regularity. See aceq6b 4666 for the converse (which does use the Axiom of Regularity). |
| Ref | Expression |
|---|---|
| aceq6a |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq2 1511 |
. . . . . . . . . . . . . 14
| |
| 2 | eleq1 1510 |
. . . . . . . . . . . . . . . 16
| |
| 3 | 2 | anbi1d 615 |
. . . . . . . . . . . . . . 15
|
| 4 | 3 | rexbidv 1640 |
. . . . . . . . . . . . . 14
|
| 5 | 1, 4 | anbi12d 626 |
. . . . . . . . . . . . 13
|
| 6 | 5 | abbidv 1553 |
. . . . . . . . . . . 12
|
| 7 | df-rab 1628 |
. . . . . . . . . . . 12
| |
| 8 | df-rab 1628 |
. . . . . . . . . . . 12
| |
| 9 | 6, 7, 8 | 3eqtr4g 1507 |
. . . . . . . . . . 11
|
| 10 | 9 | unieqd 2480 |
. . . . . . . . . 10
|
| 11 | eqid 1452 |
. . . . . . . . . 10
| |
| 12 | visset 1788 |
. . . . . . . . . . . 12
| |
| 13 | 12 | rabex 2693 |
. . . . . . . . . . 11
|
| 14 | 13 | uniex 2834 |
. . . . . . . . . 10
|
| 15 | 10, 11, 14 | fvopab4 3719 |
. . . . . . . . 9
|
| 16 | 15 | eleq1d 1516 |
. . . . . . . 8
|
| 17 | reucl 2848 |
. . . . . . . 8
| |
| 18 | 16, 17 | syl5bir 210 |
. . . . . . 7
|
| 19 | 18 | imim2d 25 |
. . . . . 6
|
| 20 | 19 | r19.20i 1680 |
. . . . 5
|
| 21 | visset 1788 |
. . . . . . 7
| |
| 22 | 21 | opabex2 3550 |
. . . . . 6
|
| 23 | fveq1 3662 |
. . . . . . . . 9
| |
| 24 | 23 | eleq1d 1516 |
. . . . . . . 8
|
| 25 | 24 | imbi2d 610 |
. . . . . . 7
|
| 26 | 25 | ralbidv 1639 |
. . . . . 6
|
| 27 | 22, 26 | cla4ev 1842 |
. . . . 5
|
| 28 | 20, 27 | syl 10 |
. . . 4
|
| 29 | 28 | 19.23aiv 1277 |
. . 3
|
| 30 | 29 | 19.20i 968 |
. 2
|
| 31 | aceq3 4657 |
. 2
| |
| 32 | 30, 31 | sylibr 200 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: aceq7 4667 ac7 4672 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-4 951 ax-5 952 ax-6 953 ax-7 954 ax-gen 955 ax-8 1101 ax-9 1102 ax-10 1103 ax-12 1104 ax-13 1107 ax-14 1108 ax-11 1180 ax-17 1190 ax-16 1194 ax-11o 1202 ax-ext 1436 ax-rep 2661 ax-sep 2671 ax-nul 2678 ax-pow 2710 ax-pr 2747 ax-un 2830 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 957 df-sb 1155 df-eu 1359 df-mo 1360 df-clab 1441 df-cleq 1446 df-clel 1449 df-ne 1563 df-ral 1625 df-rex 1626 df-reu 1627 df-rab 1628 df-v 1787 df-dif 2020 df-un 2021 df-in 2022 df-ss 2024 df-nul 2252 df-pw 2373 df-sn 2383 df-pr 2384 df-op 2387 df-uni 2472 df-br 2588 df-opab 2635 df-id 2797 df-xp 3147 df-rel 3148 df-cnv 3149 df-co 3150 df-dm 3151 df-rn 3152 df-res 3153 df-ima 3154 df-fun 3155 df-fn 3156 df-fv 3161 |