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

Theorem dvelimc 2239
Description: Version of dvelim 1934 for classes. (Contributed by Mario Carneiro, 8-Oct-2016.)
Hypotheses
Ref Expression
dvelimc.1  |-  F/_ x A
dvelimc.2  |-  F/_ z B
dvelimc.3  |-  ( z  =  y  ->  A  =  B )
Assertion
Ref Expression
dvelimc  |-  ( -. 
A. x  x  =  y  ->  F/_ x B )

Proof of Theorem dvelimc
StepHypRef Expression
1 nftru 1395 . . 3  |-  F/ x T.
2 nftru 1395 . . 3  |-  F/ z T.
3 dvelimc.1 . . . 4  |-  F/_ x A
43a1i 9 . . 3  |-  ( T. 
->  F/_ x A )
5 dvelimc.2 . . . 4  |-  F/_ z B
65a1i 9 . . 3  |-  ( T. 
->  F/_ z B )
7 dvelimc.3 . . . 4  |-  ( z  =  y  ->  A  =  B )
87a1i 9 . . 3  |-  ( T. 
->  ( z  =  y  ->  A  =  B ) )
91, 2, 4, 6, 8dvelimdc 2238 . 2  |-  ( T. 
->  ( -.  A. x  x  =  y  ->  F/_ x B ) )
109trud 1293 1  |-  ( -. 
A. x  x  =  y  ->  F/_ x B )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4   A.wal 1282    = wceq 1284   T. wtru 1285   F/_wnfc 2206
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 576  ax-in2 577  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063
This theorem depends on definitions:  df-bi 115  df-tru 1287  df-fal 1290  df-nf 1390  df-sb 1686  df-cleq 2074  df-clel 2077  df-nfc 2208
This theorem is referenced by:  nfcvf  2240
  Copyright terms: Public domain W3C validator