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Theorem disjeccnvep 38967
Description: Property of the epsilon relation. (Contributed by Peter Mazsa, 27-Apr-2020.)
Assertion
Ref Expression
disjeccnvep ((𝐴𝑉𝐵𝑊) → (([𝐴] E ∩ [𝐵] E ) = ∅ ↔ (𝐴𝐵) = ∅))

Proof of Theorem disjeccnvep
StepHypRef Expression
1 eccnvep 38965 . . 3 (𝐴𝑉 → [𝐴] E = 𝐴)
2 eccnvep 38965 . . 3 (𝐵𝑊 → [𝐵] E = 𝐵)
31, 2ineqan12d 4174 . 2 ((𝐴𝑉𝐵𝑊) → ([𝐴] E ∩ [𝐵] E ) = (𝐴𝐵))
43eqeq1d 2764 1 ((𝐴𝑉𝐵𝑊) → (([𝐴] E ∩ [𝐵] E ) = ∅ ↔ (𝐴𝐵) = ∅))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wb 209  wa 400   = wceq 1569  wcel 2142  cin 3903  c0 4285   E cep 5559  ccnv 5659  [cec 8690
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1824  ax-4 1838  ax-5 1939  ax-6 1996  ax-7 2037  ax-8 2144  ax-9 2152  ax-ext 2734  ax-sep 5256  ax-pr 5403
This proof depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1104  df-tru 1572  df-fal 1582  df-ex 1809  df-sb 2096  df-clab 2741  df-cleq 2754  df-clel 2837  df-ne 2958  df-ral 3079  df-rex 3089  df-rab 3416  df-v 3456  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4487  df-sn 4589  df-pr 4591  df-op 4595  df-br 5109  df-opab 5173  df-eprel 5560  df-xp 5666  df-rel 5667  df-cnv 5668  df-dm 5670  df-rn 5671  df-res 5672  df-ima 5673  df-ec 8694
This theorem is used by:  disjecxrncnvep  39090
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