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Theorem disjecxrncnvep 37914
Description: Two ways of saying that cosets are disjoint, special case of disjecxrn 37913. (Contributed by Peter Mazsa, 12-Jul-2020.) (Revised by Peter Mazsa, 25-Aug-2023.)
Assertion
Ref Expression
disjecxrncnvep ((𝐴𝑉𝐵𝑊) → (([𝐴](𝑅 E ) ∩ [𝐵](𝑅 E )) = ∅ ↔ ((𝐴𝐵) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅)))

Proof of Theorem disjecxrncnvep
StepHypRef Expression
1 disjecxrn 37913 . . 3 ((𝐴𝑉𝐵𝑊) → (([𝐴](𝑅 E ) ∩ [𝐵](𝑅 E )) = ∅ ↔ (([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅ ∨ ([𝐴] E ∩ [𝐵] E ) = ∅)))
2 orcom 868 . . 3 ((([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅ ∨ ([𝐴] E ∩ [𝐵] E ) = ∅) ↔ (([𝐴] E ∩ [𝐵] E ) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅))
31, 2bitrdi 286 . 2 ((𝐴𝑉𝐵𝑊) → (([𝐴](𝑅 E ) ∩ [𝐵](𝑅 E )) = ∅ ↔ (([𝐴] E ∩ [𝐵] E ) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅)))
4 disjeccnvep 37808 . . 3 ((𝐴𝑉𝐵𝑊) → (([𝐴] E ∩ [𝐵] E ) = ∅ ↔ (𝐴𝐵) = ∅))
54orbi1d 914 . 2 ((𝐴𝑉𝐵𝑊) → ((([𝐴] E ∩ [𝐵] E ) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅) ↔ ((𝐴𝐵) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅)))
63, 5bitrd 278 1 ((𝐴𝑉𝐵𝑊) → (([𝐴](𝑅 E ) ∩ [𝐵](𝑅 E )) = ∅ ↔ ((𝐴𝐵) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 394  wo 845   = wceq 1533  wcel 2098  cin 3940  c0 4319   E cep 5576  ccnv 5672  [cec 8716  cxrn 37700
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2166  ax-ext 2696  ax-sep 5295  ax-nul 5302  ax-pr 5424  ax-un 7735
This theorem depends on definitions:  df-bi 206  df-an 395  df-or 846  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2528  df-eu 2557  df-clab 2703  df-cleq 2717  df-clel 2802  df-nfc 2877  df-ne 2931  df-ral 3052  df-rex 3061  df-rab 3420  df-v 3465  df-dif 3944  df-un 3946  df-in 3948  df-ss 3958  df-nul 4320  df-if 4526  df-sn 4626  df-pr 4628  df-op 4632  df-uni 4905  df-br 5145  df-opab 5207  df-mpt 5228  df-id 5571  df-eprel 5577  df-xp 5679  df-rel 5680  df-cnv 5681  df-co 5682  df-dm 5683  df-rn 5684  df-res 5685  df-ima 5686  df-iota 6495  df-fun 6545  df-fn 6546  df-f 6547  df-fo 6549  df-fv 6551  df-1st 7987  df-2nd 7988  df-ec 8720  df-xrn 37895
This theorem is referenced by:  disjsuc2  37915
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