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Mirrors > Home > ILE Home > Th. List > cardcl | Unicode version |
Description: The cardinality of a well-orderable set is an ordinal. (Contributed by Jim Kingdon, 30-Aug-2021.) |
Ref | Expression |
---|---|
cardcl |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-card 7029 | . . . 4 | |
2 | 1 | a1i 9 | . . 3 |
3 | breq2 3928 | . . . . . 6 | |
4 | 3 | rabbidv 2670 | . . . . 5 |
5 | 4 | inteqd 3771 | . . . 4 |
6 | 5 | adantl 275 | . . 3 |
7 | encv 6633 | . . . . 5 | |
8 | 7 | simprd 113 | . . . 4 |
9 | 8 | rexlimivw 2543 | . . 3 |
10 | intexrabim 4073 | . . 3 | |
11 | 2, 6, 9, 10 | fvmptd 5495 | . 2 |
12 | onintrab2im 4429 | . 2 | |
13 | 11, 12 | eqeltrd 2214 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1331 wcel 1480 wrex 2415 crab 2418 cvv 2681 cint 3766 class class class wbr 3924 cmpt 3984 con0 4280 cfv 5118 cen 6625 ccrd 7028 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 ax-un 4350 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rex 2420 df-rab 2423 df-v 2683 df-sbc 2905 df-csb 2999 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-int 3767 df-br 3925 df-opab 3985 df-mpt 3986 df-tr 4022 df-id 4210 df-iord 4283 df-on 4285 df-suc 4288 df-xp 4540 df-rel 4541 df-cnv 4542 df-co 4543 df-dm 4544 df-iota 5083 df-fun 5120 df-fv 5126 df-en 6628 df-card 7029 |
This theorem is referenced by: (None) |
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