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Theorem brcnvepres 38290
Description: Restricted converse epsilon binary relation. (Contributed by Peter Mazsa, 10-Feb-2018.)
Assertion
Ref Expression
brcnvepres ((𝐵𝑉𝐶𝑊) → (𝐵( E ↾ 𝐴)𝐶 ↔ (𝐵𝐴𝐶𝐵)))

Proof of Theorem brcnvepres
StepHypRef Expression
1 brres 5978 . 2 (𝐶𝑊 → (𝐵( E ↾ 𝐴)𝐶 ↔ (𝐵𝐴𝐵 E 𝐶)))
2 brcnvep 38288 . . 3 (𝐵𝑉 → (𝐵 E 𝐶𝐶𝐵))
32anbi2d 630 . 2 (𝐵𝑉 → ((𝐵𝐴𝐵 E 𝐶) ↔ (𝐵𝐴𝐶𝐵)))
41, 3sylan9bbr 510 1 ((𝐵𝑉𝐶𝑊) → (𝐵( E ↾ 𝐴)𝐶 ↔ (𝐵𝐴𝐶𝐵)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395  wcel 2109   class class class wbr 5124   E cep 5557  ccnv 5658  cres 5661
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-ext 2708  ax-sep 5271  ax-nul 5281  ax-pr 5407
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-sb 2066  df-clab 2715  df-cleq 2728  df-clel 2810  df-ne 2934  df-ral 3053  df-rex 3062  df-rab 3421  df-v 3466  df-dif 3934  df-un 3936  df-in 3938  df-ss 3948  df-nul 4314  df-if 4506  df-sn 4607  df-pr 4609  df-op 4613  df-br 5125  df-opab 5187  df-eprel 5558  df-xp 5665  df-rel 5666  df-cnv 5667  df-res 5671
This theorem is referenced by:  dfeldisj3  38742  dfeldisj4  38743
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