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Definition df-syms 36393
Description: Define the class of all symmetric sets. It is used only by df-symrels 36394.

Note the similarity of Definitions df-refs 36365, df-syms 36393 and df-trs 36423, cf. the comment of dfrefrels2 36368. (Contributed by Peter Mazsa, 19-Jul-2019.)

Assertion
Ref Expression
df-syms Syms = {𝑥(𝑥 ∩ (dom 𝑥 × ran 𝑥)) S (𝑥 ∩ (dom 𝑥 × ran 𝑥))}

Detailed syntax breakdown of Definition df-syms
StepHypRef Expression
1 csyms 36080 . 2 class Syms
2 vx . . . . . . 7 setvar 𝑥
32cv 1542 . . . . . 6 class 𝑥
43cdm 5551 . . . . . . 7 class dom 𝑥
53crn 5552 . . . . . . 7 class ran 𝑥
64, 5cxp 5549 . . . . . 6 class (dom 𝑥 × ran 𝑥)
73, 6cin 3865 . . . . 5 class (𝑥 ∩ (dom 𝑥 × ran 𝑥))
87ccnv 5550 . . . 4 class (𝑥 ∩ (dom 𝑥 × ran 𝑥))
9 cssr 36073 . . . 4 class S
108, 7, 9wbr 5053 . . 3 wff (𝑥 ∩ (dom 𝑥 × ran 𝑥)) S (𝑥 ∩ (dom 𝑥 × ran 𝑥))
1110, 2cab 2714 . 2 class {𝑥(𝑥 ∩ (dom 𝑥 × ran 𝑥)) S (𝑥 ∩ (dom 𝑥 × ran 𝑥))}
121, 11wceq 1543 1 wff Syms = {𝑥(𝑥 ∩ (dom 𝑥 × ran 𝑥)) S (𝑥 ∩ (dom 𝑥 × ran 𝑥))}
Colors of variables: wff setvar class
This definition is referenced by:  dfsymrels2  36396
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