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| Description: Lemma for our Axiom of Infinity => standard Axiom of Infinity. See inf3 3471 for detailed description. |
| Ref | Expression |
|---|---|
| inf3lem.1 |
|
| inf3lem.2 |
|
| inf3lem.3 |
|
| inf3lem.4 |
|
| Ref | Expression |
|---|---|
| inf3lemd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnsuc 2389 |
. . . 4
| |
| 2 | fveq2 2832 |
. . . . . . . 8
| |
| 3 | 2 | sseq1d 1527 |
. . . . . . 7
|
| 4 | inf3lem.1 |
. . . . . . . . . . 11
| |
| 5 | inf3lem.2 |
. . . . . . . . . . 11
| |
| 6 | visset 1350 |
. . . . . . . . . . 11
| |
| 7 | inf3lem.4 |
. . . . . . . . . . 11
| |
| 8 | 4, 5, 6, 7 | inf3lemc 3462 |
. . . . . . . . . 10
|
| 9 | 8 | eleq2d 1156 |
. . . . . . . . 9
|
| 10 | visset 1350 |
. . . . . . . . . . 11
| |
| 11 | fvex 2838 |
. . . . . . . . . . 11
| |
| 12 | 4, 5, 10, 11 | inf3lema 3460 |
. . . . . . . . . 10
|
| 13 | 12 | pm3.26bd 259 |
. . . . . . . . 9
|
| 14 | 9, 13 | syl6bi 187 |
. . . . . . . 8
|
| 15 | 14 | ssrdv 1509 |
. . . . . . 7
|
| 16 | 3, 15 | syl5bir 184 |
. . . . . 6
|
| 17 | 16 | com12 13 |
. . . . 5
|
| 18 | 17 | r19.23aiv 1284 |
. . . 4
|
| 19 | 1, 18 | syl 12 |
. . 3
|
| 20 | 19 | exp 291 |
. 2
|
| 21 | 0ss 1725 |
. . 3
| |
| 22 | fveq2 2832 |
. . . . 5
| |
| 23 | inf3lem.3 |
. . . . . 6
| |
| 24 | 4, 5, 23, 7 | inf3lemb 3461 |
. . . . 5
|
| 25 | 22, 24 | syl6eq 1140 |
. . . 4
|
| 26 | 25 | sseq1d 1527 |
. . 3
|
| 27 | 21, 26 | mpbiri 169 |
. 2
|
| 28 | 20, 27 | pm2.61d2 111 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: inf3lem2 3465 inf3lem3 3466 inf3lem6 3469 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3or 582 df-3an 583 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-rex 1206 df-rab 1208 df-v 1349 df-sbc 1441 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-if 1777 df-pw 1799 df-sn 1811 df-pr 1812 df-tp 1814 df-op 1815 df-uni 1920 df-tr 2042 df-br 2063 df-opab 2098 df-eprel 2122 df-id 2125 df-po 2128 df-so 2138 df-fr 2169 df-we 2186 df-ord 2202 df-on 2203 df-lim 2204 df-suc 2205 df-om 2373 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 df-fv 2438 df-rdg 2970 |