ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  negcon1ad Unicode version

Theorem negcon1ad 8452
Description: Contraposition law for unary minus. One-way deduction form of negcon1 8398. (Contributed by David Moews, 28-Feb-2017.)
Hypotheses
Ref Expression
negidd.1  |-  ( ph  ->  A  e.  CC )
negcon1ad.2  |-  ( ph  -> 
-u A  =  B )
Assertion
Ref Expression
negcon1ad  |-  ( ph  -> 
-u B  =  A )

Proof of Theorem negcon1ad
StepHypRef Expression
1 negcon1ad.2 . 2  |-  ( ph  -> 
-u A  =  B )
2 negidd.1 . . 3  |-  ( ph  ->  A  e.  CC )
32negcld 8444 . . . 4  |-  ( ph  -> 
-u A  e.  CC )
41, 3eqeltrrd 2307 . . 3  |-  ( ph  ->  B  e.  CC )
52, 4negcon1d 8451 . 2  |-  ( ph  ->  ( -u A  =  B  <->  -u B  =  A ) )
61, 5mpbid 147 1  |-  ( ph  -> 
-u B  =  A )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1395    e. wcel 2200   CCcc 7997   -ucneg 8318
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-setind 4629  ax-resscn 8091  ax-1cn 8092  ax-icn 8094  ax-addcl 8095  ax-addrcl 8096  ax-mulcl 8097  ax-addcom 8099  ax-addass 8101  ax-distr 8103  ax-i2m1 8104  ax-0id 8107  ax-rnegex 8108  ax-cnre 8110
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-iota 5278  df-fun 5320  df-fv 5326  df-riota 5954  df-ov 6004  df-oprab 6005  df-mpo 6006  df-sub 8319  df-neg 8320
This theorem is referenced by:  coseq0negpitopi  15510
  Copyright terms: Public domain W3C validator