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Theorem brid 38294
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 6114 . . 3 I = I
21breqi 5113 . 2 (𝐴 I 𝐵𝐴 I 𝐵)
3 reli 5789 . . 3 Rel I
43relbrcnv 6078 . 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 5107   I cid 5532  ccnv 5637
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 2701  ax-sep 5251  ax-nul 5261  ax-pr 5387
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 2708  df-cleq 2721  df-clel 2803  df-ral 3045  df-rex 3054  df-rab 3406  df-v 3449  df-dif 3917  df-un 3919  df-ss 3931  df-nul 4297  df-if 4489  df-sn 4590  df-pr 4592  df-op 4596  df-br 5108  df-opab 5170  df-id 5533  df-xp 5644  df-rel 5645  df-cnv 5646
This theorem is referenced by:  ideq2  38295
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