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| Description: Lemma for our Axiom of Infinity => standard Axiom of Infinity. See inf3 3471 for detailed description. In the proof, we invoke the Axiom of Replacement in the form of funrnex 2743. |
| Ref | Expression |
|---|---|
| inf3lem.1 |
|
| inf3lem.2 |
|
| inf3lem.3 |
|
| inf3lem.4 |
|
| Ref | Expression |
|---|---|
| inf3lem7 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | inf3lem.1 |
. . 3
| |
| 2 | inf3lem.2 |
. . 3
| |
| 3 | inf3lem.3 |
. . 3
| |
| 4 | inf3lem.4 |
. . 3
| |
| 5 | 1, 2, 3, 4 | inf3lem6 3469 |
. 2
|
| 6 | f1f 2781 |
. . . . 5
| |
| 7 | fdm 2756 |
. . . . 5
| |
| 8 | 6, 7 | syl 12 |
. . . 4
|
| 9 | dfdm4 2525 |
. . . 4
| |
| 10 | 8, 9 | syl5eqr 1138 |
. . 3
|
| 11 | funrnex 2743 |
. . . 4
| |
| 12 | frn 2757 |
. . . . . 6
| |
| 13 | visset 1350 |
. . . . . . . 8
| |
| 14 | 13 | pwex 1806 |
. . . . . . 7
|
| 15 | 14 | ssex 1700 |
. . . . . 6
|
| 16 | 6, 12, 15 | 3syl 21 |
. . . . 5
|
| 17 | df-rn 2429 |
. . . . . 6
| |
| 18 | 17 | eleq1i 1152 |
. . . . 5
|
| 19 | 16, 18 | sylib 173 |
. . . 4
|
| 20 | df-f1 2435 |
. . . . 5
| |
| 21 | 20 | pm3.27bd 263 |
. . . 4
|
| 22 | 11, 19, 21 | sylc 62 |
. . 3
|
| 23 | 10, 22 | eqeltrrd 1164 |
. 2
|
| 24 | 5, 23 | syl 12 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: inf3 3471 inf5 3472 |
| 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 ax-reg 1078 |
| 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-ne 1192 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-pss 1494 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-f 2434 df-f1 2435 df-fv 2438 df-rdg 2970 |