ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  19.21t Structured version   Unicode version

Theorem 19.21t 1471
Description: Closed form of Theorem 19.21 of [Margaris] p. 90. (Contributed by NM, 27-May-1997.)
Assertion
Ref Expression
19.21t  F/

Proof of Theorem 19.21t
StepHypRef Expression
1 df-nf 1347 . 2  F/
2 19.21ht 1470 . 2
31, 2sylbi 114 1  F/
Colors of variables: wff set class
Syntax hints:   wi 4   wb 98  wal 1240   F/wnf 1346
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-5 1333  ax-gen 1335  ax-4 1397  ax-ial 1424  ax-i5r 1425
This theorem depends on definitions:  df-bi 110  df-nf 1347
This theorem is referenced by:  19.21  1472  nfimd  1474  equs5or  1708  sbal1yz  1874  r19.21t  2388  ceqsalt  2574  sbciegft  2787
  Copyright terms: Public domain W3C validator