MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  nffun Structured version   Visualization version   GIF version

Theorem nffun 6372
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 6351 . 2 (Fun 𝐹 ↔ (Rel 𝐹 ∧ (𝐹𝐹) ⊆ I ))
2 nffun.1 . . . 4 𝑥𝐹
32nfrel 5648 . . 3 𝑥Rel 𝐹
42nfcnv 5743 . . . . 5 𝑥𝐹
52, 4nfco 5730 . . . 4 𝑥(𝐹𝐹)
6 nfcv 2977 . . . 4 𝑥 I
75, 6nfss 3959 . . 3 𝑥(𝐹𝐹) ⊆ I
83, 7nfan 1896 . 2 𝑥(Rel 𝐹 ∧ (𝐹𝐹) ⊆ I )
91, 8nfxfr 1849 1 𝑥Fun 𝐹
Colors of variables: wff setvar class
Syntax hints:  wa 398  wnf 1780  wnfc 2961  wss 3935   I cid 5453  ccnv 5548  ccom 5553  Rel wrel 5554  Fun wfun 6343
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rab 3147  df-v 3496  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-sn 4561  df-pr 4563  df-op 4567  df-br 5059  df-opab 5121  df-rel 5556  df-cnv 5557  df-co 5558  df-fun 6351
This theorem is referenced by:  nffn  6446  nff1  6567  fliftfun  7059  funimass4f  30376  nfdfat  43320
  Copyright terms: Public domain W3C validator