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Mathbox for Peter Mazsa |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > brid | Structured version Visualization version GIF version |
Description: Property of the identity binary relation. (Contributed by Peter Mazsa, 18-Dec-2021.) |
Ref | Expression |
---|---|
brid | ⊢ (𝐴 I 𝐵 ↔ 𝐵 I 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnvi 6169 | . . 3 ⊢ ◡ I = I | |
2 | 1 | breqi 5157 | . 2 ⊢ (𝐴◡ I 𝐵 ↔ 𝐴 I 𝐵) |
3 | reli 5843 | . . 3 ⊢ Rel I | |
4 | 3 | relbrcnv 6133 | . 2 ⊢ (𝐴◡ I 𝐵 ↔ 𝐵 I 𝐴) |
5 | 2, 4 | bitr3i 277 | 1 ⊢ (𝐴 I 𝐵 ↔ 𝐵 I 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 206 class class class wbr 5151 I cid 5586 ◡ccnv 5692 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-ext 2708 ax-sep 5305 ax-nul 5315 ax-pr 5441 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1779 df-sb 2065 df-clab 2715 df-cleq 2729 df-clel 2816 df-ral 3062 df-rex 3071 df-rab 3437 df-v 3483 df-dif 3969 df-un 3971 df-ss 3983 df-nul 4343 df-if 4535 df-sn 4635 df-pr 4637 df-op 4641 df-br 5152 df-opab 5214 df-id 5587 df-xp 5699 df-rel 5700 df-cnv 5701 |
This theorem is referenced by: ideq2 38303 |
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