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Theorem nffun 5349
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 5328 . 2  |-  ( Fun 
F  <->  ( Rel  F  /\  ( F  o.  `' F )  C_  _I  ) )
2 nffun.1 . . . 4  |-  F/_ x F
32nfrel 4811 . . 3  |-  F/ x Rel  F
42nfcnv 4909 . . . . 5  |-  F/_ x `' F
52, 4nfco 4895 . . . 4  |-  F/_ x
( F  o.  `' F )
6 nfcv 2374 . . . 4  |-  F/_ x  _I
75, 6nfss 3220 . . 3  |-  F/ x
( F  o.  `' F )  C_  _I
83, 7nfan 1613 . 2  |-  F/ x
( Rel  F  /\  ( F  o.  `' F )  C_  _I  )
91, 8nfxfr 1522 1  |-  F/ x Fun  F
Colors of variables: wff set class
Syntax hints:    /\ wa 104   F/wnf 1508   F/_wnfc 2361    C_ wss 3200    _I cid 4385   `'ccnv 4724    o. ccom 4729   Rel wrel 4730   Fun wfun 5320
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-sn 3675  df-pr 3676  df-op 3678  df-br 4089  df-opab 4151  df-rel 4732  df-cnv 4733  df-co 4734  df-fun 5328
This theorem is referenced by:  nffn  5426  nff1  5540  fliftfun  5936
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