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Theorem disjecxrncnvep 38369
Description: Two ways of saying that cosets are disjoint, special case of disjecxrn 38368. (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 38368 . . 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 38265 . . 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 3910  c0 4292   E cep 5530  ccnv 5630  [cec 8646  cxrn 38161
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 5246  ax-nul 5256  ax-pr 5382  ax-un 7691
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 3403  df-v 3446  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4293  df-if 4485  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-br 5103  df-opab 5165  df-mpt 5184  df-id 5526  df-eprel 5531  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-iota 6452  df-fun 6501  df-fn 6502  df-f 6503  df-fo 6505  df-fv 6507  df-1st 7947  df-2nd 7948  df-ec 8650  df-xrn 38346
This theorem is referenced by:  disjsuc2  38370
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