NFE Home New Foundations Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  NFE Home  >  Th. List  >  nff GIF version

Theorem nff 5222
Description: Bound-variable hypothesis builder for a mapping. (Contributed by NM, 29-Jan-2004.) (Revised by Mario Carneiro, 15-Oct-2016.)
Hypotheses
Ref Expression
nff.1 xF
nff.2 xA
nff.3 xB
Assertion
Ref Expression
nff x F:A–→B

Proof of Theorem nff
StepHypRef Expression
1 df-f 4792 . 2 (F:A–→B ↔ (F Fn A ran F B))
2 nff.1 . . . 4 xF
3 nff.2 . . . 4 xA
42, 3nffn 5181 . . 3 x F Fn A
52nfrn 4964 . . . 4 xran F
6 nff.3 . . . 4 xB
75, 6nfss 3267 . . 3 xran F B
84, 7nfan 1824 . 2 x(F Fn A ran F B)
91, 8nfxfr 1570 1 x F:A–→B
Colors of variables: wff setvar class
Syntax hints:   wa 358  wnf 1544  wnfc 2477   wss 3258  ran crn 4774   Fn wfn 4777  –→wf 4778
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334  ax-nin 4079  ax-xp 4080  ax-cnv 4081  ax-1c 4082  ax-sset 4083  ax-si 4084  ax-ins2 4085  ax-ins3 4086  ax-typlower 4087  ax-sn 4088
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2479  df-ne 2519  df-ral 2620  df-rex 2621  df-v 2862  df-sbc 3048  df-nin 3212  df-compl 3213  df-in 3214  df-un 3215  df-dif 3216  df-symdif 3217  df-ss 3260  df-nul 3552  df-if 3664  df-pw 3725  df-sn 3742  df-pr 3743  df-uni 3893  df-int 3928  df-opk 4059  df-1c 4137  df-pw1 4138  df-uni1 4139  df-xpk 4186  df-cnvk 4187  df-ins2k 4188  df-ins3k 4189  df-imak 4190  df-cok 4191  df-p6 4192  df-sik 4193  df-ssetk 4194  df-imagek 4195  df-idk 4196  df-addc 4379  df-nnc 4380  df-phi 4566  df-op 4567  df-opab 4624  df-br 4641  df-co 4727  df-ima 4728  df-cnv 4786  df-rn 4787  df-dm 4788  df-fun 4790  df-fn 4791  df-f 4792
This theorem is referenced by:  nff1  5257
  Copyright terms: Public domain W3C validator