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Theorem extep 38278
Description: Property of epsilon relation, see also extid 38305, extssr 38507 and the comment of df-ssr 38496. (Contributed by Peter Mazsa, 10-Jul-2019.)
Assertion
Ref Expression
extep ((𝐴𝑉𝐵𝑊) → ([𝐴] E = [𝐵] E ↔ 𝐴 = 𝐵))

Proof of Theorem extep
StepHypRef Expression
1 eccnvep 38277 . 2 (𝐴𝑉 → [𝐴] E = 𝐴)
2 eccnvep 38277 . 2 (𝐵𝑊 → [𝐵] E = 𝐵)
31, 2eqeqan12d 2744 1 ((𝐴𝑉𝐵𝑊) → ([𝐴] E = [𝐵] E ↔ 𝐴 = 𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395   = wceq 1540  wcel 2109   E cep 5540  ccnv 5640  [cec 8672
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 2702  ax-sep 5254  ax-nul 5264  ax-pr 5390
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-clab 2709  df-cleq 2722  df-clel 2804  df-ne 2927  df-ral 3046  df-rex 3055  df-rab 3409  df-v 3452  df-dif 3920  df-un 3922  df-in 3924  df-ss 3934  df-nul 4300  df-if 4492  df-sn 4593  df-pr 4595  df-op 4599  df-br 5111  df-opab 5173  df-eprel 5541  df-xp 5647  df-rel 5648  df-cnv 5649  df-dm 5651  df-rn 5652  df-res 5653  df-ima 5654  df-ec 8676
This theorem is referenced by: (None)
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