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Theorem brid 36369
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 6034 . . 3 I = I
21breqi 5076 . 2 (𝐴 I 𝐵𝐴 I 𝐵)
3 reli 5725 . . 3 Rel I
43relbrcnv 6004 . 2 (𝐴 I 𝐵𝐵 I 𝐴)
52, 4bitr3i 276 1 (𝐴 I 𝐵𝐵 I 𝐴)
Colors of variables: wff setvar class
Syntax hints:  wb 205   class class class wbr 5070   I cid 5479  ccnv 5579
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pr 5347
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-sb 2069  df-clab 2716  df-cleq 2730  df-clel 2817  df-ral 3068  df-rex 3069  df-rab 3072  df-v 3424  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-sn 4559  df-pr 4561  df-op 4565  df-br 5071  df-opab 5133  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588
This theorem is referenced by:  ideq2  36370
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