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| Description: Lemma for transfinite recursion. The union of all acceptable functions is a function. |
| Ref | Expression |
|---|---|
| tfrlem.1 |
|
| tfrlem.2 |
|
| Ref | Expression |
|---|---|
| tfrlem7 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dffun4 3514 |
. 2
| |
| 2 | tfrlem.1 |
. . 3
| |
| 3 | tfrlem.2 |
. . 3
| |
| 4 | 2, 3 | tfrlem6 3901 |
. 2
|
| 5 | 3 | eleq2i 1530 |
. . . . . . . 8
|
| 6 | eluni 2496 |
. . . . . . . 8
| |
| 7 | 5, 6 | bitr 173 |
. . . . . . 7
|
| 8 | 3 | eleq2i 1530 |
. . . . . . . 8
|
| 9 | eluni 2496 |
. . . . . . . 8
| |
| 10 | 8, 9 | bitr 173 |
. . . . . . 7
|
| 11 | 7, 10 | anbi12i 481 |
. . . . . 6
|
| 12 | eeanv 1318 |
. . . . . 6
| |
| 13 | 11, 12 | bitr4 176 |
. . . . 5
|
| 14 | an4 505 |
. . . . . . . 8
| |
| 15 | ancom 435 |
. . . . . . . 8
| |
| 16 | 14, 15 | bitr 173 |
. . . . . . 7
|
| 17 | 2, 3 | tfrlem5 3900 |
. . . . . . . 8
|
| 18 | 17 | imp 350 |
. . . . . . 7
|
| 19 | 16, 18 | sylbi 199 |
. . . . . 6
|
| 20 | 19 | 19.23aivv 1291 |
. . . . 5
|
| 21 | 13, 20 | sylbi 199 |
. . . 4
|
| 22 | 21 | ax-gen 960 |
. . 3
|
| 23 | 22 | gen2 980 |
. 2
|
| 24 | 1, 4, 23 | mpbir2an 728 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: tfrlem9 3904 tfrlem10 3905 tfr1 3909 numthlem 4755 zorn2lem1 4760 zorn2lem2 4761 zorn2lem5 4764 zorn2lem7 4766 |
| 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-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-3or 774 df-3an 775 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-rab 1644 df-v 1803 df-sbc 1932 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-tp 2405 df-op 2406 df-uni 2494 df-br 2610 df-opab 2657 df-tr 2671 df-eprel 2821 df-id 2824 df-po 2831 df-so 2841 df-fr 2907 df-we 2924 df-ord 2941 df-on 2942 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 |