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Definition df-se 5224
Description: Define the set-like predicate. (Contributed by Mario Carneiro, 19-Nov-2014.)
Assertion
Ref Expression
df-se (𝑅 Se 𝐴 ↔ ∀𝑥𝐴 {𝑦𝐴𝑦𝑅𝑥} ∈ V)
Distinct variable groups:   𝑥,𝑦,𝑅   𝑥,𝐴,𝑦

Detailed syntax breakdown of Definition df-se
StepHypRef Expression
1 cA . . 3 class 𝐴
2 cR . . 3 class 𝑅
31, 2wse 5221 . 2 wff 𝑅 Se 𝐴
4 vy . . . . . . 7 setvar 𝑦
54cv 1629 . . . . . 6 class 𝑦
6 vx . . . . . . 7 setvar 𝑥
76cv 1629 . . . . . 6 class 𝑥
85, 7, 2wbr 4802 . . . . 5 wff 𝑦𝑅𝑥
98, 4, 1crab 3052 . . . 4 class {𝑦𝐴𝑦𝑅𝑥}
10 cvv 3338 . . . 4 class V
119, 10wcel 2137 . . 3 wff {𝑦𝐴𝑦𝑅𝑥} ∈ V
1211, 6, 1wral 3048 . 2 wff 𝑥𝐴 {𝑦𝐴𝑦𝑅𝑥} ∈ V
133, 12wb 196 1 wff (𝑅 Se 𝐴 ↔ ∀𝑥𝐴 {𝑦𝐴𝑦𝑅𝑥} ∈ V)
Colors of variables: wff setvar class
This definition is referenced by:  seex  5227  exse  5228  sess1  5232  sess2  5233  nfse  5239  epse  5247  seinxp  5340  dfse2  5655  exse2  7268  bj-seex  33223
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