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

Theorem nfanOLD 1826
Description: Obsolete proof of nfan 1824 as of 2-Jan-2018. (Contributed by Mario Carneiro, 11-Aug-2016.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypotheses
Ref Expression
nfan.1  F/
nfan.2  F/
Assertion
Ref Expression
nfanOLD  F/

Proof of Theorem nfanOLD
StepHypRef Expression
1 df-an 360 . 2
2 nfan.1 . . . 4  F/
3 nfan.2 . . . . 5  F/
43nfn 1793 . . . 4  F/
52, 4nfim 1813 . . 3  F/
65nfn 1793 . 2  F/
71, 6nfxfr 1570 1  F/
Colors of variables: wff setvar class
Syntax hints:   wn 3   wi 4   wa 358   F/wnf 1544
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-11 1746
This theorem depends on definitions:  df-bi 177  df-an 360  df-tru 1319  df-ex 1542  df-nf 1545
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator