NFE Home New Foundations Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  NFE Home  >  Th. List  >  ax46to4 Unicode version

Theorem ax46to4 2163
Description: Re-derivation of ax-4 2135 from ax46 2162. Only propositional calculus is used for the re-derivation. (Contributed by Scott Fenton, 12-Sep-2005.) (Proof modification is discouraged.) (New usage is discouraged.)
Assertion
Ref Expression
ax46to4

Proof of Theorem ax46to4
StepHypRef Expression
1 ax-1 5 . 2
2 ax46 2162 . 2
31, 2syl 15 1
Colors of variables: wff set class
Syntax hints:   wn 3   wi 4  wal 1540
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-4 2135  ax-6o 2137
  Copyright terms: Public domain W3C validator