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| Mirrors > Home > MPE Home > Th. List > Mathboxes > idsymrel | Structured version Visualization version GIF version | ||
| Description: The identity relation is symmetric. (Contributed by AV, 19-Jun-2022.) |
| Ref | Expression |
|---|---|
| idsymrel | ⊢ SymRel I |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnvi 6130 | . 2 ⊢ ◡ I = I | |
| 2 | reli 5805 | . 2 ⊢ Rel I | |
| 3 | dfsymrel4 38569 | . 2 ⊢ ( SymRel I ↔ (◡ I = I ∧ Rel I )) | |
| 4 | 1, 2, 3 | mpbir2an 711 | 1 ⊢ SymRel I |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 I cid 5547 ◡ccnv 5653 Rel wrel 5659 SymRel wsymrel 38211 |
| 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 2007 ax-8 2110 ax-9 2118 ax-ext 2707 ax-sep 5266 ax-nul 5276 ax-pr 5402 |
| 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 2065 df-clab 2714 df-cleq 2727 df-clel 2809 df-ral 3052 df-rex 3061 df-rab 3416 df-v 3461 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-nul 4309 df-if 4501 df-sn 4602 df-pr 4604 df-op 4608 df-br 5120 df-opab 5182 df-id 5548 df-xp 5660 df-rel 5661 df-cnv 5662 df-dm 5664 df-rn 5665 df-res 5666 df-symrel 38562 |
| This theorem is referenced by: (None) |
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