ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  oafnex Unicode version

Theorem oafnex 6348
Description: The characteristic function for ordinal addition is defined everywhere. (Contributed by Jim Kingdon, 27-Jul-2019.)
Assertion
Ref Expression
oafnex  |-  ( x  e.  _V  |->  suc  x
)  Fn  _V

Proof of Theorem oafnex
StepHypRef Expression
1 vex 2692 . . 3  |-  x  e. 
_V
21sucex 4423 . 2  |-  suc  x  e.  _V
3 eqid 2140 . 2  |-  ( x  e.  _V  |->  suc  x
)  =  ( x  e.  _V  |->  suc  x
)
42, 3fnmpti 5259 1  |-  ( x  e.  _V  |->  suc  x
)  Fn  _V
Colors of variables: wff set class
Syntax hints:   _Vcvv 2689    |-> cmpt 3997   suc csuc 4295    Fn wfn 5126
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 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-13 1492  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4054  ax-pow 4106  ax-pr 4139  ax-un 4363
This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ral 2422  df-rex 2423  df-v 2691  df-un 3080  df-in 3082  df-ss 3089  df-pw 3517  df-sn 3538  df-pr 3539  df-op 3541  df-uni 3745  df-br 3938  df-opab 3998  df-mpt 3999  df-id 4223  df-suc 4301  df-xp 4553  df-rel 4554  df-cnv 4555  df-co 4556  df-dm 4557  df-fun 5133  df-fn 5134
This theorem is referenced by:  fnoa  6351  oaexg  6352  oav  6358  oav2  6367  oawordi  6373
  Copyright terms: Public domain W3C validator