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Theorem br1cnvinxp 39191
Description: Binary relation on the converse of an intersection with a Cartesian product. (Contributed by Peter Mazsa, 27-Jul-2019.)
Assertion
Ref Expression
br1cnvinxp (𝐶◡(𝑅 ∩ (𝐴 × 𝐵))𝐷 ↔ ((𝐶 ∈ 𝐵 ∧ 𝐷 ∈ 𝐴) ∧ 𝐷𝑅𝐶))

Proof of Theorem br1cnvinxp
StepHypRef Expression
1 relinxp 5792 . . 3 Rel (𝑅 ∩ (𝐴 × 𝐵))
21relbrcnv 6103 . 2 (𝐶◡(𝑅 ∩ (𝐴 × 𝐵))𝐷 ↔ 𝐷(𝑅 ∩ (𝐴 × 𝐵))𝐶)
3 brinxp2 5729 . 2 (𝐷(𝑅 ∩ (𝐴 × 𝐵))𝐶 ↔ ((𝐷 ∈ 𝐴 ∧ 𝐶 ∈ 𝐵) ∧ 𝐷𝑅𝐶))
4 ancom 466 . . 3 ((𝐷 ∈ 𝐴 ∧ 𝐶 ∈ 𝐵) ↔ (𝐶 ∈ 𝐵 ∧ 𝐷 ∈ 𝐴))
54anbi1i 636 . 2 (((𝐷 ∈ 𝐴 ∧ 𝐶 ∈ 𝐵) ∧ 𝐷𝑅𝐶) ↔ ((𝐶 ∈ 𝐵 ∧ 𝐷 ∈ 𝐴) ∧ 𝐷𝑅𝐶))
62, 3, 53bitri 300 1 (𝐶◡(𝑅 ∩ (𝐴 × 𝐵))𝐷 ↔ ((𝐶 ∈ 𝐵 ∧ 𝐷 ∈ 𝐴) ∧ 𝐷𝑅𝐶))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   ↔ wb 209   ∧ wa 401   ∈ wcel 2145   ∩ cin 3898   class class class wbr 5103   × cxp 5649  ◡ccnv 5650
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2733  ax-sep 5249  ax-pr 5391
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2740  df-cleq 2753  df-clel 2836  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-br 5104  df-opab 5168  df-xp 5657  df-rel 5658  df-cnv 5659
This theorem is used by:  br1cnvres  39206
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