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Theorem disjecxrncnvep 38376
Description: Two ways of saying that cosets are disjoint, special case of disjecxrn 38375. (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 38375 . . 3 ((𝐴𝑉𝐵𝑊) → (([𝐴](𝑅 E ) ∩ [𝐵](𝑅 E )) = ∅ ↔ (([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅ ∨ ([𝐴] E ∩ [𝐵] E ) = ∅)))
2 orcom 870 . . 3 ((([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅ ∨ ([𝐴] E ∩ [𝐵] E ) = ∅) ↔ (([𝐴] E ∩ [𝐵] E ) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅))
31, 2bitrdi 287 . 2 ((𝐴𝑉𝐵𝑊) → (([𝐴](𝑅 E ) ∩ [𝐵](𝑅 E )) = ∅ ↔ (([𝐴] E ∩ [𝐵] E ) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅)))
4 disjeccnvep 38272 . . 3 ((𝐴𝑉𝐵𝑊) → (([𝐴] E ∩ [𝐵] E ) = ∅ ↔ (𝐴𝐵) = ∅))
54orbi1d 916 . 2 ((𝐴𝑉𝐵𝑊) → ((([𝐴] E ∩ [𝐵] E ) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅) ↔ ((𝐴𝐵) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅)))
63, 5bitrd 279 1 ((𝐴𝑉𝐵𝑊) → (([𝐴](𝑅 E ) ∩ [𝐵](𝑅 E )) = ∅ ↔ ((𝐴𝐵) = ∅ ∨ ([𝐴]𝑅 ∩ [𝐵]𝑅) = ∅)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395  wo 847   = wceq 1540  wcel 2109  cin 3913  c0 4296   E cep 5537  ccnv 5637  [cec 8669  cxrn 38168
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-sep 5251  ax-nul 5261  ax-pr 5387  ax-un 7711
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-rab 3406  df-v 3449  df-dif 3917  df-un 3919  df-in 3921  df-ss 3931  df-nul 4297  df-if 4489  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4872  df-br 5108  df-opab 5170  df-mpt 5189  df-id 5533  df-eprel 5538  df-xp 5644  df-rel 5645  df-cnv 5646  df-co 5647  df-dm 5648  df-rn 5649  df-res 5650  df-ima 5651  df-iota 6464  df-fun 6513  df-fn 6514  df-f 6515  df-fo 6517  df-fv 6519  df-1st 7968  df-2nd 7969  df-ec 8673  df-xrn 38353
This theorem is referenced by:  disjsuc2  38377
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