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Mirrors > Home > ILE Home > Th. List > onenon | GIF version |
Description: Every ordinal number is numerable. (Contributed by Mario Carneiro, 29-Apr-2015.) |
Ref | Expression |
---|---|
onenon | ⊢ (𝐴 ∈ On → 𝐴 ∈ dom card) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | enrefg 6303 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
2 | isnumi 6500 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐴 ≈ 𝐴) → 𝐴 ∈ dom card) | |
3 | 1, 2 | mpdan 412 | 1 ⊢ (𝐴 ∈ On → 𝐴 ∈ dom card) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∈ wcel 1434 class class class wbr 3787 Oncon0 4120 dom cdm 4365 ≈ cen 6278 cardccrd 6497 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-13 1445 ax-14 1446 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 ax-sep 3898 ax-pow 3950 ax-pr 3966 ax-un 4190 |
This theorem depends on definitions: df-bi 115 df-3an 922 df-tru 1288 df-nf 1391 df-sb 1687 df-eu 1945 df-mo 1946 df-clab 2069 df-cleq 2075 df-clel 2078 df-nfc 2209 df-ral 2354 df-rex 2355 df-rab 2358 df-v 2604 df-un 2978 df-in 2980 df-ss 2987 df-pw 3386 df-sn 3406 df-pr 3407 df-op 3409 df-uni 3604 df-int 3639 df-br 3788 df-opab 3842 df-mpt 3843 df-id 4050 df-xp 4371 df-rel 4372 df-cnv 4373 df-co 4374 df-dm 4375 df-rn 4376 df-res 4377 df-ima 4378 df-fun 4928 df-fn 4929 df-f 4930 df-f1 4931 df-fo 4932 df-f1o 4933 df-en 6281 df-card 6498 |
This theorem is referenced by: (None) |
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