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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 4629 |
. 2
| |
| 2 | id 59 |
. . . 4
| |
| 3 | suceq 3034 |
. . . 4
| |
| 4 | 2, 3 | breq12d 2631 |
. . 3
|
| 5 | id 59 |
. . . 4
| |
| 6 | suceq 3034 |
. . . 4
| |
| 7 | 5, 6 | breq12d 2631 |
. . 3
|
| 8 | id 59 |
. . . 4
| |
| 9 | suceq 3034 |
. . . 4
| |
| 10 | 8, 9 | breq12d 2631 |
. . 3
|
| 11 | id 59 |
. . . 4
| |
| 12 | suceq 3034 |
. . . 4
| |
| 13 | 11, 12 | breq12d 2631 |
. . 3
|
| 14 | omensuc 4637 |
. . . 4
| |
| 15 | 14 | a1i 8 |
. . 3
|
| 16 | visset 1813 |
. . . . . . 7
| |
| 17 | 16 | sucex 3050 |
. . . . . . 7
|
| 18 | en2sn 4431 |
. . . . . . 7
| |
| 19 | 16, 17, 18 | mp2an 697 |
. . . . . 6
|
| 20 | unen 4434 |
. . . . . . . . 9
| |
| 21 | df-suc 2954 |
. . . . . . . . 9
| |
| 22 | df-suc 2954 |
. . . . . . . . 9
| |
| 23 | 20, 21, 22 | 3brtr4g 2647 |
. . . . . . . 8
|
| 24 | 23 | ex 373 |
. . . . . . 7
|
| 25 | eloni 2958 |
. . . . . . . . . 10
| |
| 26 | ordirr 2966 |
. . . . . . . . . 10
| |
| 27 | 25, 26 | syl 10 |
. . . . . . . . 9
|
| 28 | disjsn 2441 |
. . . . . . . . 9
| |
| 29 | 27, 28 | sylibr 200 |
. . . . . . . 8
|
| 30 | eloni 2958 |
. . . . . . . . . 10
| |
| 31 | ordirr 2966 |
. . . . . . . . . 10
| |
| 32 | 30, 31 | syl 10 |
. . . . . . . . 9
|
| 33 | sucelon 3068 |
. . . . . . . . 9
| |
| 34 | disjsn 2441 |
. . . . . . . . 9
| |
| 35 | 32, 33, 34 | 3imtr4 219 |
. . . . . . . 8
|
| 36 | 29, 35 | jca 288 |
. . . . . . 7
|
| 37 | 24, 36 | syl5 21 |
. . . . . 6
|
| 38 | 19, 37 | mpan2 696 |
. . . . 5
|
| 39 | 38 | com12 11 |
. . . 4
|
| 40 | 39 | ad2antrr 404 |
. . 3
|
| 41 | visset 1813 |
. . . . . 6
| |
| 42 | limensuc 4507 |
. . . . . 6
| |
| 43 | 41, 42 | mpan 695 |
. . . . 5
|
| 44 | 43 | ad2antrr 404 |
. . . 4
|
| 45 | 44 | a1d 12 |
. . 3
|
| 46 | 4, 7, 10, 13, 15, 40, 45 | tfindsg 3162 |
. 2
|
| 47 | 1, 46 | mpanl2 707 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: cardlim 4851 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-9 965 ax-10 966 ax-11 967 ax-12 968 ax-13 969 ax-14 970 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-rep 2693 ax-sep 2703 ax-nul 2710 ax-pow 2742 ax-pr 2779 ax-un 2866 ax-inf2 4625 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 776 df-3an 777 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 df-ral 1649 df-rex 1650 df-rab 1652 df-v 1812 df-sbc 1942 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-if 2362 df-pw 2402 df-sn 2412 df-pr 2413 df-tp 2415 df-op 2416 df-uni 2504 df-br 2620 df-opab 2667 df-tr 2681 df-eprel 2832 df-id 2835 df-po 2840 df-so 2850 df-fr 2917 df-we 2934 df-ord 2951 df-on 2952 df-lim 2953 df-suc 2954 df-om 3132 df-xp 3184 df-rel 3185 df-cnv 3186 df-co 3187 df-dm 3188 df-rn 3189 df-res 3190 df-ima 3191 df-fun 3192 df-fn 3193 df-f 3194 df-f1 3195 df-fo 3196 df-f1o 3197 df-fv 3198 df-1o 4133 df-er 4261 df-en 4368 df-dom 4369 |