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Mirrors > Home > MPE Home > Th. List > Mathboxes > elsymrels2 | Structured version Visualization version GIF version |
Description: Element of the class of symmetric relations. (Contributed by Peter Mazsa, 17-Aug-2021.) |
Ref | Expression |
---|---|
elsymrels2 | ⊢ (𝑅 ∈ SymRels ↔ (◡𝑅 ⊆ 𝑅 ∧ 𝑅 ∈ Rels )) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfsymrels2 36638 | . 2 ⊢ SymRels = {𝑟 ∈ Rels ∣ ◡𝑟 ⊆ 𝑟} | |
2 | cnveq 5779 | . . 3 ⊢ (𝑟 = 𝑅 → ◡𝑟 = ◡𝑅) | |
3 | id 22 | . . 3 ⊢ (𝑟 = 𝑅 → 𝑟 = 𝑅) | |
4 | 2, 3 | sseq12d 3958 | . 2 ⊢ (𝑟 = 𝑅 → (◡𝑟 ⊆ 𝑟 ↔ ◡𝑅 ⊆ 𝑅)) |
5 | 1, 4 | rabeqel 36373 | 1 ⊢ (𝑅 ∈ SymRels ↔ (◡𝑅 ⊆ 𝑅 ∧ 𝑅 ∈ Rels )) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 205 ∧ wa 395 = wceq 1541 ∈ wcel 2109 ⊆ wss 3891 ◡ccnv 5587 Rels crels 36314 SymRels csymrels 36323 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-12 2174 ax-ext 2710 ax-sep 5226 ax-nul 5233 ax-pr 5355 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-clab 2717 df-cleq 2731 df-clel 2817 df-ral 3070 df-rex 3071 df-rab 3074 df-v 3432 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-op 4573 df-br 5079 df-opab 5141 df-xp 5594 df-rel 5595 df-cnv 5596 df-dm 5598 df-rn 5599 df-res 5600 df-rels 36582 df-ssr 36595 df-syms 36635 df-symrels 36636 |
This theorem is referenced by: elsymrelsrel 36650 |
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