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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 6114 | . 2 ⊢ ◡ I = I | |
| 2 | reli 5789 | . 2 ⊢ Rel I | |
| 3 | dfsymrel4 38542 | . 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 5532 ◡ccnv 5637 Rel wrel 5643 SymRel wsymrel 38181 |
| 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-in 3921 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 df-dm 5648 df-rn 5649 df-res 5650 df-symrel 38535 |
| This theorem is referenced by: (None) |
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