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| Description: Our Axiom of Choice (in the form of ac3 4719) implies the Axiom of Choice (first form) of [Enderton] p. 49. The proof uses neither AC nor the Axiom of Regularity. See aceq6b 4714 for the converse (which does use the Axiom of Regularity). |
| Ref | Expression |
|---|---|
| aceq6a |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq2 1527 |
. . . . . . . . . . . . . 14
| |
| 2 | eleq1 1526 |
. . . . . . . . . . . . . . . 16
| |
| 3 | 2 | anbi1d 615 |
. . . . . . . . . . . . . . 15
|
| 4 | 3 | rexbidv 1656 |
. . . . . . . . . . . . . 14
|
| 5 | 1, 4 | anbi12d 626 |
. . . . . . . . . . . . 13
|
| 6 | 5 | abbidv 1569 |
. . . . . . . . . . . 12
|
| 7 | df-rab 1644 |
. . . . . . . . . . . 12
| |
| 8 | df-rab 1644 |
. . . . . . . . . . . 12
| |
| 9 | 6, 7, 8 | 3eqtr4g 1523 |
. . . . . . . . . . 11
|
| 10 | 9 | unieqd 2502 |
. . . . . . . . . 10
|
| 11 | eqid 1468 |
. . . . . . . . . 10
| |
| 12 | visset 1804 |
. . . . . . . . . . . 12
| |
| 13 | 12 | rabex 2715 |
. . . . . . . . . . 11
|
| 14 | 13 | uniex 2861 |
. . . . . . . . . 10
|
| 15 | 10, 11, 14 | fvopab4 3765 |
. . . . . . . . 9
|
| 16 | 15 | eleq1d 1532 |
. . . . . . . 8
|
| 17 | reucl 2875 |
. . . . . . . 8
| |
| 18 | 16, 17 | syl5bir 210 |
. . . . . . 7
|
| 19 | 18 | imim2d 25 |
. . . . . 6
|
| 20 | 19 | r19.20i 1696 |
. . . . 5
|
| 21 | visset 1804 |
. . . . . . 7
| |
| 22 | 21 | opabex2 3596 |
. . . . . 6
|
| 23 | fveq1 3708 |
. . . . . . . . 9
| |
| 24 | 23 | eleq1d 1532 |
. . . . . . . 8
|
| 25 | 24 | imbi2d 610 |
. . . . . . 7
|
| 26 | 25 | ralbidv 1655 |
. . . . . 6
|
| 27 | 22, 26 | cla4ev 1860 |
. . . . 5
|
| 28 | 20, 27 | syl 10 |
. . . 4
|
| 29 | 28 | 19.23aiv 1290 |
. . 3
|
| 30 | 29 | 19.20i 989 |
. 2
|
| 31 | aceq3 4705 |
. 2
| |
| 32 | 30, 31 | sylibr 200 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: aceq7 4715 ac7 4720 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-9 962 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-rep 2683 ax-sep 2693 ax-pow 2732 ax-pr 2769 ax-un 2857 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-ral 1641 df-rex 1642 df-reu 1643 df-rab 1644 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-pw 2392 df-sn 2402 df-pr 2403 df-op 2406 df-uni 2494 df-br 2610 df-opab 2657 df-id 2824 df-xp 3174 df-rel 3175 df-cnv 3176 df-co 3177 df-dm 3178 df-rn 3179 df-res 3180 df-ima 3181 df-fun 3182 df-fn 3183 df-fv 3188 |