Description: The membership relation is a relation. (Contributed by NM, 26-Apr-1998) (Revised by Mario Carneiro, 21-Dec-2013)
Ref | Expression | ||
---|---|---|---|
Assertion | rele | ⊢ Rel E |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-eprel | ⊢ E = { 〈 𝑥 , 𝑦 〉 ∣ 𝑥 ∈ 𝑦 } | |
2 | 1 | relopabiv | ⊢ Rel E |