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Theorem nffun 6548
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 6527 . 2 (Fun 𝐹 ↔ (Rel 𝐹 ∧ (𝐹𝐹) ⊆ I ))
2 nffun.1 . . . 4 𝑥𝐹
32nfrel 5756 . . 3 𝑥Rel 𝐹
42nfcnv 5854 . . . . 5 𝑥𝐹
52, 4nfco 5841 . . . 4 𝑥(𝐹𝐹)
6 nfcv 2927 . . . 4 𝑥 I
75, 6nfss 3932 . . 3 𝑥(𝐹𝐹) ⊆ I
83, 7nfan 1922 . 2 𝑥(Rel 𝐹 ∧ (𝐹𝐹) ⊆ I )
91, 8nfxfr 1876 1 𝑥Fun 𝐹
Colors of variables: wff setvar class
Syntax hints:  wa 400  wnf 1806  wnfc 2912  wss 3907   I cid 5545  ccnv 5650  ccom 5655  Rel wrel 5656  Fun wfun 6519
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ral 3080  df-rab 3418  df-v 3459  df-dif 3910  df-un 3912  df-ss 3924  df-nul 4289  df-if 4484  df-sn 4586  df-pr 4588  df-op 4592  df-br 5105  df-opab 5167  df-rel 5658  df-cnv 5659  df-co 5660  df-fun 6527
This theorem is referenced by:  nffn  6624  nff1  6762  fliftfun  7300  funimass4f  32890  nfdfat  47720
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