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Theorem brid 38563
Description: Property of the identity binary relation. (Contributed by Peter Mazsa, 18-Dec-2021.)
Assertion
Ref Expression
brid (𝐴 I 𝐵𝐵 I 𝐴)

Proof of Theorem brid
StepHypRef Expression
1 cnvi 6107 . . 3 I = I
21breqi 5106 . 2 (𝐴 I 𝐵𝐴 I 𝐵)
3 reli 5783 . . 3 Rel I
43relbrcnv 6074 . 2 (𝐴 I 𝐵𝐵 I 𝐴)
52, 4bitr3i 277 1 (𝐴 I 𝐵𝐵 I 𝐴)
Colors of variables: wff setvar class
Syntax hints:  wb 206   class class class wbr 5100   I cid 5526  ccnv 5631
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 2709  ax-sep 5243  ax-pr 5379
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 2716  df-cleq 2729  df-clel 2812  df-ral 3053  df-rex 3063  df-rab 3402  df-v 3444  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-sn 4583  df-pr 4585  df-op 4589  df-br 5101  df-opab 5163  df-id 5527  df-xp 5638  df-rel 5639  df-cnv 5640
This theorem is referenced by:  ideq2  38564
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