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Theorem nffun 5141
Description: Bound-variable hypothesis builder for a function. (Contributed by NM, 30-Jan-2004.)
Hypothesis
Ref Expression
nffun.1  |-  F/_ x F
Assertion
Ref Expression
nffun  |-  F/ x Fun  F

Proof of Theorem nffun
StepHypRef Expression
1 df-fun 5120 . 2  |-  ( Fun 
F  <->  ( Rel  F  /\  ( F  o.  `' F )  C_  _I  ) )
2 nffun.1 . . . 4  |-  F/_ x F
32nfrel 4619 . . 3  |-  F/ x Rel  F
42nfcnv 4713 . . . . 5  |-  F/_ x `' F
52, 4nfco 4699 . . . 4  |-  F/_ x
( F  o.  `' F )
6 nfcv 2279 . . . 4  |-  F/_ x  _I
75, 6nfss 3085 . . 3  |-  F/ x
( F  o.  `' F )  C_  _I
83, 7nfan 1544 . 2  |-  F/ x
( Rel  F  /\  ( F  o.  `' F )  C_  _I  )
91, 8nfxfr 1450 1  |-  F/ x Fun  F
Colors of variables: wff set class
Syntax hints:    /\ wa 103   F/wnf 1436   F/_wnfc 2266    C_ wss 3066    _I cid 4205   `'ccnv 4533    o. ccom 4538   Rel wrel 4539   Fun wfun 5112
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-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-v 2683  df-un 3070  df-in 3072  df-ss 3079  df-sn 3528  df-pr 3529  df-op 3531  df-br 3925  df-opab 3985  df-rel 4541  df-cnv 4542  df-co 4543  df-fun 5120
This theorem is referenced by:  nffn  5214  nff1  5321  fliftfun  5690
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