Theorem brid 38650

Description: Property of the identity binary relation. (Contributed by Peter Mazsa, 18-Dec-2021.)

Assertion

Ref	Expression
brid	⊢ (𝐴 I 𝐵 ↔ 𝐵 I 𝐴)

Proof of Theorem brid

Step	Hyp	Ref	Expression
1		cnvi 6100	. . 3 ⊢ ◡ I = I
2	1	breqi 5092	. 2 ⊢ (𝐴◡ I 𝐵 ↔ 𝐴 I 𝐵)
3		reli 5776	. . 3 ⊢ Rel I
4	3	relbrcnv 6067	. 2 ⊢ (𝐴◡ I 𝐵 ↔ 𝐵 I 𝐴)
5	2, 4	bitr3i 277	1 ⊢ (𝐴 I 𝐵 ↔ 𝐵 I 𝐴)

Syntax hints:   ↔ wb 206   class class class wbr 5086   I cid 5519  ^◡ccnv 5624

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 5232  ax-pr 5371

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 3391  df-v 3432  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4275  df-if 4468  df-sn 4569  df-pr 4571  df-op 4575  df-br 5087  df-opab 5149  df-id 5520  df-xp 5631  df-rel 5632  df-cnv 5633

This theorem is referenced by:  ideq2  38651