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Mirrors > Home > MPE Home > Th. List > Mathboxes > dfsymrels4 | Structured version Visualization version GIF version |
Description: Alternate definition of the class of symmetric relations. (Contributed by Peter Mazsa, 20-Jul-2019.) |
Ref | Expression |
---|---|
dfsymrels4 | ⊢ SymRels = {𝑟 ∈ Rels ∣ ◡𝑟 = 𝑟} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfsymrels2 35661 | . 2 ⊢ SymRels = {𝑟 ∈ Rels ∣ ◡𝑟 ⊆ 𝑟} | |
2 | elrelscnveq 35612 | . 2 ⊢ (𝑟 ∈ Rels → (◡𝑟 ⊆ 𝑟 ↔ ◡𝑟 = 𝑟)) | |
3 | 1, 2 | rabimbieq 35394 | 1 ⊢ SymRels = {𝑟 ∈ Rels ∣ ◡𝑟 = 𝑟} |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1528 {crab 3139 ⊆ wss 3933 ◡ccnv 5547 Rels crels 35336 SymRels csymrels 35345 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-sep 5194 ax-nul 5201 ax-pr 5320 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ral 3140 df-rex 3141 df-rab 3144 df-v 3494 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-nul 4289 df-if 4464 df-pw 4537 df-sn 4558 df-pr 4560 df-op 4564 df-br 5058 df-opab 5120 df-xp 5554 df-rel 5555 df-cnv 5556 df-dm 5558 df-rn 5559 df-res 5560 df-rels 35605 df-ssr 35618 df-syms 35658 df-symrels 35659 |
This theorem is referenced by: dfsymrels5 35664 elsymrels4 35671 |
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