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| Description: Any infinite ordinal is equinumerous to its successor. Exercise 7 of [TakeutiZaring] p. 88. |
| Ref | Expression |
|---|---|
| infensuc |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | omelon 4775 |
. 2
| |
| 2 | id 59 |
. . . 4
| |
| 3 | suceq 3038 |
. . . 4
| |
| 4 | 2, 3 | breq12d 2704 |
. . 3
|
| 5 | id 59 |
. . . 4
| |
| 6 | suceq 3038 |
. . . 4
| |
| 7 | 5, 6 | breq12d 2704 |
. . 3
|
| 8 | id 59 |
. . . 4
| |
| 9 | suceq 3038 |
. . . 4
| |
| 10 | 8, 9 | breq12d 2704 |
. . 3
|
| 11 | id 59 |
. . . 4
| |
| 12 | suceq 3038 |
. . . 4
| |
| 13 | 11, 12 | breq12d 2704 |
. . 3
|
| 14 | omensuc 4783 |
. . . 4
| |
| 15 | 14 | a1i 8 |
. . 3
|
| 16 | visset 1859 |
. . . . . . 7
| |
| 17 | 16 | sucex 3168 |
. . . . . . 7
|
| 18 | en2sn 4572 |
. . . . . . 7
| |
| 19 | 16, 17, 18 | mp2an 701 |
. . . . . 6
|
| 20 | unen 4575 |
. . . . . . . . 9
| |
| 21 | df-suc 2981 |
. . . . . . . . 9
| |
| 22 | df-suc 2981 |
. . . . . . . . 9
| |
| 23 | 20, 21, 22 | 3brtr4g 2720 |
. . . . . . . 8
|
| 24 | 23 | ex 371 |
. . . . . . 7
|
| 25 | eloni 2985 |
. . . . . . . . . 10
| |
| 26 | ordirr 2993 |
. . . . . . . . . 10
| |
| 27 | 25, 26 | syl 10 |
. . . . . . . . 9
|
| 28 | disjsn 2502 |
. . . . . . . . 9
| |
| 29 | 27, 28 | sylibr 198 |
. . . . . . . 8
|
| 30 | eloni 2985 |
. . . . . . . . . 10
| |
| 31 | ordirr 2993 |
. . . . . . . . . 10
| |
| 32 | 30, 31 | syl 10 |
. . . . . . . . 9
|
| 33 | sucelon 3174 |
. . . . . . . . 9
| |
| 34 | disjsn 2502 |
. . . . . . . . 9
| |
| 35 | 32, 33, 34 | 3imtr4i 217 |
. . . . . . . 8
|
| 36 | 29, 35 | jca 286 |
. . . . . . 7
|
| 37 | 24, 36 | syl5 21 |
. . . . . 6
|
| 38 | 19, 37 | mpan2 700 |
. . . . 5
|
| 39 | 38 | com12 11 |
. . . 4
|
| 40 | 39 | ad2antrr 404 |
. . 3
|
| 41 | visset 1859 |
. . . . . 6
| |
| 42 | limensuc 4654 |
. . . . . 6
| |
| 43 | 41, 42 | mpan 699 |
. . . . 5
|
| 44 | 43 | ad2antrr 404 |
. . . 4
|
| 45 | 44 | a1d 12 |
. . 3
|
| 46 | 4, 7, 10, 13, 15, 40, 45 | tfindsg 3213 |
. 2
|
| 47 | 1, 46 | mpanl2 711 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: cardsucinf 4991 cardlim 5001 omsublim 11448 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-8 1000 ax-9 1001 ax-10 1002 ax-11 1003 ax-12 1004 ax-13 1005 ax-14 1006 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-10o 1177 ax-16 1247 ax-11o 1255 ax-ext 1500 ax-rep 2767 ax-sep 2777 ax-nul 2784 ax-pow 2818 ax-pr 2855 ax-un 3089 ax-inf2 4770 |
| This theorem depends on definitions: df-bi 145 df-or 222 df-an 223 df-3or 782 df-3an 783 df-ex 1017 df-sb 1209 df-eu 1421 df-mo 1422 df-clab 1506 df-cleq 1511 df-clel 1514 df-ne 1630 df-ral 1695 df-rex 1696 df-rab 1698 df-v 1858 df-sbc 1987 df-dif 2101 df-un 2102 df-in 2103 df-ss 2105 df-nul 2333 df-if 2416 df-pw 2459 df-sn 2470 df-pr 2471 df-tp 2473 df-op 2474 df-uni 2570 df-br 2693 df-opab 2741 df-tr 2755 df-eprel 2910 df-id 2913 df-po 2918 df-so 2929 df-fr 2947 df-we 2962 df-ord 2978 df-on 2979 df-lim 2980 df-suc 2981 df-om 3219 df-xp 3265 df-rel 3266 df-cnv 3267 df-co 3268 df-dm 3269 df-rn 3270 df-res 3271 df-ima 3272 df-fun 3273 df-fn 3274 df-f 3275 df-f1 3276 df-fo 3277 df-f1o 3278 df-fv 3279 df-1o 4269 df-er 4401 df-en 4509 df-dom 4510 |