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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 4601 |
. 2
| |
| 2 | id 59 |
. . . 4
| |
| 3 | suceq 3024 |
. . . 4
| |
| 4 | 2, 3 | breq12d 2621 |
. . 3
|
| 5 | id 59 |
. . . 4
| |
| 6 | suceq 3024 |
. . . 4
| |
| 7 | 5, 6 | breq12d 2621 |
. . 3
|
| 8 | id 59 |
. . . 4
| |
| 9 | suceq 3024 |
. . . 4
| |
| 10 | 8, 9 | breq12d 2621 |
. . 3
|
| 11 | id 59 |
. . . 4
| |
| 12 | suceq 3024 |
. . . 4
| |
| 13 | 11, 12 | breq12d 2621 |
. . 3
|
| 14 | omensuc 4609 |
. . . 4
| |
| 15 | 14 | a1i 8 |
. . 3
|
| 16 | visset 1804 |
. . . . . . 7
| |
| 17 | 16 | sucex 3040 |
. . . . . . 7
|
| 18 | en2sn 4412 |
. . . . . . 7
| |
| 19 | 16, 17, 18 | mp2an 695 |
. . . . . 6
|
| 20 | unen 4414 |
. . . . . . . . 9
| |
| 21 | df-suc 2944 |
. . . . . . . . 9
| |
| 22 | df-suc 2944 |
. . . . . . . . 9
| |
| 23 | 20, 21, 22 | 3brtr4g 2637 |
. . . . . . . 8
|
| 24 | 23 | ex 373 |
. . . . . . 7
|
| 25 | eloni 2948 |
. . . . . . . . . 10
| |
| 26 | ordirr 2956 |
. . . . . . . . . 10
| |
| 27 | 25, 26 | syl 10 |
. . . . . . . . 9
|
| 28 | disjsn 2431 |
. . . . . . . . 9
| |
| 29 | 27, 28 | sylibr 200 |
. . . . . . . 8
|
| 30 | eloni 2948 |
. . . . . . . . . 10
| |
| 31 | ordirr 2956 |
. . . . . . . . . 10
| |
| 32 | 30, 31 | syl 10 |
. . . . . . . . 9
|
| 33 | sucelon 3058 |
. . . . . . . . 9
| |
| 34 | disjsn 2431 |
. . . . . . . . 9
| |
| 35 | 32, 33, 34 | 3imtr4 219 |
. . . . . . . 8
|
| 36 | 29, 35 | jca 288 |
. . . . . . 7
|
| 37 | 24, 36 | syl5 21 |
. . . . . 6
|
| 38 | 19, 37 | mpan2 694 |
. . . . 5
|
| 39 | 38 | com12 11 |
. . . 4
|
| 40 | 39 | ad2antrr 404 |
. . 3
|
| 41 | visset 1804 |
. . . . . 6
| |
| 42 | limensuc 4487 |
. . . . . 6
| |
| 43 | 41, 42 | mpan 693 |
. . . . 5
|
| 44 | 43 | ad2antrr 404 |
. . . 4
|
| 45 | 44 | a1d 12 |
. . 3
|
| 46 | 4, 7, 10, 13, 15, 40, 45 | tfindsg 3152 |
. 2
|
| 47 | 1, 46 | mpanl2 705 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: cardlim 4823 |
| 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-rep 2683 ax-sep 2693 ax-nul 2700 ax-pow 2732 ax-pr 2769 ax-un 2857 ax-inf2 4597 |
| 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-if 2352 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-lim 2943 df-suc 2944 df-om 3122 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-f 3184 df-f1 3185 df-fo 3186 df-f1o 3187 df-fv 3188 df-1o 4117 df-er 4245 df-en 4351 df-dom 4352 |