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Mirrors > Home > MPE Home > Th. List > cardon | Structured version Visualization version GIF version |
Description: The cardinal number of a set is an ordinal number. Proposition 10.6(1) of [TakeutiZaring] p. 85. (Contributed by Mario Carneiro, 7-Jan-2013.) (Revised by Mario Carneiro, 13-Sep-2013.) |
Ref | Expression |
---|---|
cardon | ⊢ (card‘𝐴) ∈ On |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cardf2 9356 | . 2 ⊢ card:{𝑥 ∣ ∃𝑦 ∈ On 𝑦 ≈ 𝑥}⟶On | |
2 | 0elon 6212 | . 2 ⊢ ∅ ∈ On | |
3 | 1, 2 | f0cli 6841 | 1 ⊢ (card‘𝐴) ∈ On |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2111 {cab 2776 ∃wrex 3107 class class class wbr 5030 Oncon0 6159 ‘cfv 6324 ≈ cen 8489 cardccrd 9348 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-int 4839 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-ord 6162 df-on 6163 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-fv 6332 df-card 9352 |
This theorem is referenced by: isnum3 9367 cardidm 9372 ficardom 9374 cardne 9378 carden2b 9380 cardlim 9385 cardsdomelir 9386 cardsdomel 9387 iscard 9388 iscard2 9389 carddom2 9390 carduni 9394 cardom 9399 cardsdom2 9401 domtri2 9402 cardval2 9404 infxpidm2 9428 dfac8b 9442 numdom 9449 indcardi 9452 alephnbtwn 9482 alephnbtwn2 9483 alephsucdom 9490 cardaleph 9500 iscard3 9504 alephinit 9506 alephsson 9511 alephval3 9521 dfac12r 9557 dfac12k 9558 cardadju 9605 djunum 9606 pwsdompw 9615 cff 9659 cardcf 9663 cfon 9666 cfeq0 9667 cfsuc 9668 cff1 9669 cfflb 9670 cflim2 9674 cfss 9676 fin1a2lem9 9819 ttukeylem6 9925 ttukeylem7 9926 unsnen 9964 inar1 10186 tskcard 10192 tskuni 10194 gruina 10229 iscard4 40241 |
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