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| Mirrors > Home > ILE Home > Th. List > oafnex | GIF version | ||
| Description: The characteristic function for ordinal addition is defined everywhere. (Contributed by Jim Kingdon, 27-Jul-2019.) |
| Ref | Expression |
|---|---|
| oafnex | ⊢ (𝑥 ∈ V ↦ suc 𝑥) Fn V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2779 | . . 3 ⊢ 𝑥 ∈ V | |
| 2 | 1 | sucex 4565 | . 2 ⊢ suc 𝑥 ∈ V |
| 3 | eqid 2207 | . 2 ⊢ (𝑥 ∈ V ↦ suc 𝑥) = (𝑥 ∈ V ↦ suc 𝑥) | |
| 4 | 2, 3 | fnmpti 5424 | 1 ⊢ (𝑥 ∈ V ↦ suc 𝑥) Fn V |
| Colors of variables: wff set class |
| Syntax hints: Vcvv 2776 ↦ cmpt 4121 suc csuc 4430 Fn wfn 5285 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-sep 4178 ax-pow 4234 ax-pr 4269 ax-un 4498 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ral 2491 df-rex 2492 df-v 2778 df-un 3178 df-in 3180 df-ss 3187 df-pw 3628 df-sn 3649 df-pr 3650 df-op 3652 df-uni 3865 df-br 4060 df-opab 4122 df-mpt 4123 df-id 4358 df-suc 4436 df-xp 4699 df-rel 4700 df-cnv 4701 df-co 4702 df-dm 4703 df-fun 5292 df-fn 5293 |
| This theorem is referenced by: fnoa 6556 oaexg 6557 oav 6563 oav2 6572 oawordi 6578 |
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