Users' Mathboxes Mathbox for Peter Mazsa < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  disjeq Structured version   Visualization version   GIF version

Theorem disjeq 39037
Description: Equality theorem for disjoints. (Contributed by Peter Mazsa, 22-Sep-2021.)
Assertion
Ref Expression
disjeq (𝐴 = 𝐵 → ( Disj 𝐴 ↔ Disj 𝐵))

Proof of Theorem disjeq
StepHypRef Expression
1 eqimss2 3994 . . 3 (𝐴 = 𝐵𝐵𝐴)
21disjssd 39036 . 2 (𝐴 = 𝐵 → ( Disj 𝐴 → Disj 𝐵))
3 eqimss 3993 . . 3 (𝐴 = 𝐵𝐴𝐵)
43disjssd 39036 . 2 (𝐴 = 𝐵 → ( Disj 𝐵 → Disj 𝐴))
52, 4impbid 212 1 (𝐴 = 𝐵 → ( Disj 𝐴 ↔ Disj 𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206   = wceq 1542   Disj wdisjALTV 38422
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-11 2163  ax-ext 2709  ax-sep 5242  ax-nul 5252  ax-pr 5378
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-ral 3053  df-rex 3062  df-rab 3401  df-v 3443  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4287  df-if 4481  df-sn 4582  df-pr 4584  df-op 4588  df-br 5100  df-opab 5162  df-id 5520  df-xp 5631  df-rel 5632  df-cnv 5633  df-co 5634  df-dm 5635  df-rn 5636  df-res 5637  df-coss 38704  df-cnvrefrel 38810  df-funALTV 38970  df-disjALTV 38993
This theorem is referenced by:  disjeqi  39038  disjeqd  39039  disjdmqseqeq1  39040
  Copyright terms: Public domain W3C validator