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Theorem br1cnvres 38444
Description: Binary relation on the converse of a restriction. (Contributed by Peter Mazsa, 27-Jul-2019.)
Assertion
Ref Expression
br1cnvres (𝐵𝑉 → (𝐵(𝑅𝐴)𝐶 ↔ (𝐶𝐴𝐶𝑅𝐵)))

Proof of Theorem br1cnvres
StepHypRef Expression
1 df-res 5635 . . . 4 (𝑅𝐴) = (𝑅 ∩ (𝐴 × V))
21cnveqi 5822 . . 3 (𝑅𝐴) = (𝑅 ∩ (𝐴 × V))
32breqi 5103 . 2 (𝐵(𝑅𝐴)𝐶𝐵(𝑅 ∩ (𝐴 × V))𝐶)
4 elex 3460 . . 3 (𝐵𝑉𝐵 ∈ V)
5 br1cnvinxp 38429 . . . . 5 (𝐵(𝑅 ∩ (𝐴 × V))𝐶 ↔ ((𝐵 ∈ V ∧ 𝐶𝐴) ∧ 𝐶𝑅𝐵))
6 anass 468 . . . . 5 (((𝐵 ∈ V ∧ 𝐶𝐴) ∧ 𝐶𝑅𝐵) ↔ (𝐵 ∈ V ∧ (𝐶𝐴𝐶𝑅𝐵)))
75, 6bitri 275 . . . 4 (𝐵(𝑅 ∩ (𝐴 × V))𝐶 ↔ (𝐵 ∈ V ∧ (𝐶𝐴𝐶𝑅𝐵)))
87baib 535 . . 3 (𝐵 ∈ V → (𝐵(𝑅 ∩ (𝐴 × V))𝐶 ↔ (𝐶𝐴𝐶𝑅𝐵)))
94, 8syl 17 . 2 (𝐵𝑉 → (𝐵(𝑅 ∩ (𝐴 × V))𝐶 ↔ (𝐶𝐴𝐶𝑅𝐵)))
103, 9bitrid 283 1 (𝐵𝑉 → (𝐵(𝑅𝐴)𝐶 ↔ (𝐶𝐴𝐶𝑅𝐵)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395  wcel 2114  Vcvv 3439  cin 3899   class class class wbr 5097   × cxp 5621  ccnv 5622  cres 5625
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2707  ax-sep 5240  ax-nul 5250  ax-pr 5376
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2714  df-cleq 2727  df-clel 2810  df-ral 3051  df-rex 3060  df-rab 3399  df-v 3441  df-dif 3903  df-un 3905  df-in 3907  df-ss 3917  df-nul 4285  df-if 4479  df-sn 4580  df-pr 4582  df-op 4586  df-br 5098  df-opab 5160  df-xp 5629  df-rel 5630  df-cnv 5631  df-res 5635
This theorem is referenced by:  elec1cnvres  38445  coss1cnvres  38677
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