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Theorem nffun 6515
Description: Bound-variable hypothesis builder for a function. (Contributed by NM, 30-Jan-2004.)
Hypothesis
Ref Expression
nffun.1 𝑥𝐹
Assertion
Ref Expression
nffun 𝑥Fun 𝐹

Proof of Theorem nffun
StepHypRef Expression
1 df-fun 6494 . 2 (Fun 𝐹 ↔ (Rel 𝐹 ∧ (𝐹𝐹) ⊆ I ))
2 nffun.1 . . . 4 𝑥𝐹
32nfrel 5730 . . 3 𝑥Rel 𝐹
42nfcnv 5827 . . . . 5 𝑥𝐹
52, 4nfco 5814 . . . 4 𝑥(𝐹𝐹)
6 nfcv 2902 . . . 4 𝑥 I
75, 6nfss 3915 . . 3 𝑥(𝐹𝐹) ⊆ I
83, 7nfan 1906 . 2 𝑥(Rel 𝐹 ∧ (𝐹𝐹) ⊆ I )
91, 8nfxfr 1860 1 𝑥Fun 𝐹
Colors of variables: wff setvar class
Syntax hints:  wa 396  wnf 1790  wnfc 2887  wss 3890   I cid 5519  ccnv 5624  ccom 5629  Rel wrel 5630  Fun wfun 6486
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2712
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-clab 2719  df-cleq 2732  df-clel 2815  df-nfc 2889  df-ral 3055  df-rab 3393  df-v 3434  df-dif 3893  df-un 3895  df-ss 3907  df-nul 4269  df-if 4462  df-sn 4563  df-pr 4565  df-op 4569  df-br 5080  df-opab 5142  df-rel 5632  df-cnv 5633  df-co 5634  df-fun 6494
This theorem is referenced by:  nffn  6591  nff1  6728  fliftfun  7263  funimass4f  32736  nfdfat  47597
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