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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 6116 | . . 3 ⊢ ◡ I = I | |
| 2 | 1 | breqi 5115 | . 2 ⊢ (𝐴◡ I 𝐵 ↔ 𝐴 I 𝐵) |
| 3 | reli 5791 | . . 3 ⊢ Rel I | |
| 4 | 3 | relbrcnv 6080 | . 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 5109 I cid 5534 ◡ccnv 5639 |
| 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 2702 ax-sep 5253 ax-nul 5263 ax-pr 5389 |
| 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 2709 df-cleq 2722 df-clel 2804 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-dif 3919 df-un 3921 df-ss 3933 df-nul 4299 df-if 4491 df-sn 4592 df-pr 4594 df-op 4598 df-br 5110 df-opab 5172 df-id 5535 df-xp 5646 df-rel 5647 df-cnv 5648 |
| This theorem is referenced by: ideq2 38290 |
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