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

Theorem nffun 5911
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 5890 . 2 (Fun 𝐹 ↔ (Rel 𝐹 ∧ (𝐹𝐹) ⊆ I ))
2 nffun.1 . . . 4 𝑥𝐹
32nfrel 5204 . . 3 𝑥Rel 𝐹
42nfcnv 5301 . . . . 5 𝑥𝐹
52, 4nfco 5287 . . . 4 𝑥(𝐹𝐹)
6 nfcv 2764 . . . 4 𝑥 I
75, 6nfss 3596 . . 3 𝑥(𝐹𝐹) ⊆ I
83, 7nfan 1828 . 2 𝑥(Rel 𝐹 ∧ (𝐹𝐹) ⊆ I )
91, 8nfxfr 1779 1 𝑥Fun 𝐹
Colors of variables: wff setvar class
Syntax hints:  wa 384  wnf 1708  wnfc 2751  wss 3574   I cid 5023  ccnv 5113  ccom 5118  Rel wrel 5119  Fun wfun 5882
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-opab 4713  df-rel 5121  df-cnv 5122  df-co 5123  df-fun 5890
This theorem is referenced by:  nffn  5987  nff1  6099  fliftfun  6562  funimass4f  29437  nfdfat  41210
  Copyright terms: Public domain W3C validator