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

Theorem nffun 6347
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 6326 . 2 (Fun 𝐹 ↔ (Rel 𝐹 ∧ (𝐹𝐹) ⊆ I ))
2 nffun.1 . . . 4 𝑥𝐹
32nfrel 5618 . . 3 𝑥Rel 𝐹
42nfcnv 5713 . . . . 5 𝑥𝐹
52, 4nfco 5700 . . . 4 𝑥(𝐹𝐹)
6 nfcv 2955 . . . 4 𝑥 I
75, 6nfss 3907 . . 3 𝑥(𝐹𝐹) ⊆ I
83, 7nfan 1900 . 2 𝑥(Rel 𝐹 ∧ (𝐹𝐹) ⊆ I )
91, 8nfxfr 1854 1 𝑥Fun 𝐹
Colors of variables: wff setvar class
Syntax hints:  wa 399  wnf 1785  wnfc 2936  wss 3881   I cid 5424  ccnv 5518  ccom 5523  Rel wrel 5524  Fun wfun 6318
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ral 3111  df-v 3443  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-sn 4526  df-pr 4528  df-op 4532  df-br 5031  df-opab 5093  df-rel 5526  df-cnv 5527  df-co 5528  df-fun 6326
This theorem is referenced by:  nffn  6422  nff1  6547  fliftfun  7044  funimass4f  30396  nfdfat  43683
  Copyright terms: Public domain W3C validator