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Theorem oafnex 6340
Description: The characteristic function for ordinal addition is defined everywhere. (Contributed by Jim Kingdon, 27-Jul-2019.)
Assertion
Ref Expression
oafnex (𝑥 ∈ V ↦ suc 𝑥) Fn V

Proof of Theorem oafnex
StepHypRef Expression
1 vex 2689 . . 3 𝑥 ∈ V
21sucex 4415 . 2 suc 𝑥 ∈ V
3 eqid 2139 . 2 (𝑥 ∈ V ↦ suc 𝑥) = (𝑥 ∈ V ↦ suc 𝑥)
42, 3fnmpti 5251 1 (𝑥 ∈ V ↦ suc 𝑥) Fn V
Colors of variables: wff set class
Syntax hints:  Vcvv 2686  cmpt 3989  suc csuc 4287   Fn wfn 5118
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 2121  ax-sep 4046  ax-pow 4098  ax-pr 4131  ax-un 4355
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-eu 2002  df-mo 2003  df-clab 2126  df-cleq 2132  df-clel 2135  df-nfc 2270  df-ral 2421  df-rex 2422  df-v 2688  df-un 3075  df-in 3077  df-ss 3084  df-pw 3512  df-sn 3533  df-pr 3534  df-op 3536  df-uni 3737  df-br 3930  df-opab 3990  df-mpt 3991  df-id 4215  df-suc 4293  df-xp 4545  df-rel 4546  df-cnv 4547  df-co 4548  df-dm 4549  df-fun 5125  df-fn 5126
This theorem is referenced by:  fnoa  6343  oaexg  6344  oav  6350  oav2  6359  oawordi  6365
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