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Theorem nffun 5205
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 5184 . 2  |-  ( Fun 
F  <->  ( Rel  F  /\  ( F  o.  `' F )  C_  _I  ) )
2 nffun.1 . . . 4  |-  F/_ x F
32nfrel 4683 . . 3  |-  F/ x Rel  F
42nfcnv 4777 . . . . 5  |-  F/_ x `' F
52, 4nfco 4763 . . . 4  |-  F/_ x
( F  o.  `' F )
6 nfcv 2306 . . . 4  |-  F/_ x  _I
75, 6nfss 3130 . . 3  |-  F/ x
( F  o.  `' F )  C_  _I
83, 7nfan 1552 . 2  |-  F/ x
( Rel  F  /\  ( F  o.  `' F )  C_  _I  )
91, 8nfxfr 1461 1  |-  F/ x Fun  F
Colors of variables: wff set class
Syntax hints:    /\ wa 103   F/wnf 1447   F/_wnfc 2293    C_ wss 3111    _I cid 4260   `'ccnv 4597    o. ccom 4602   Rel wrel 4603   Fun wfun 5176
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 1434  ax-7 1435  ax-gen 1436  ax-ie1 1480  ax-ie2 1481  ax-8 1491  ax-10 1492  ax-11 1493  ax-i12 1494  ax-bndl 1496  ax-4 1497  ax-17 1513  ax-i9 1517  ax-ial 1521  ax-i5r 1522  ax-ext 2146
This theorem depends on definitions:  df-bi 116  df-3an 969  df-tru 1345  df-nf 1448  df-sb 1750  df-clab 2151  df-cleq 2157  df-clel 2160  df-nfc 2295  df-ral 2447  df-v 2723  df-un 3115  df-in 3117  df-ss 3124  df-sn 3576  df-pr 3577  df-op 3579  df-br 3977  df-opab 4038  df-rel 4605  df-cnv 4606  df-co 4607  df-fun 5184
This theorem is referenced by:  nffn  5278  nff1  5385  fliftfun  5758
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