Metamath Proof Explorer


Theorem rabidim2

Description: Membership in a restricted abstraction, implication. (Contributed by Glauco Siliprandi, 26-Jun-2021)

Ref Expression
Assertion rabidim2 ⊢ x ∈ x ∈ A | φ → φ

Proof

Step Hyp Ref Expression
1 rabid ⊢ x ∈ x ∈ A | φ ↔ x ∈ A ∧ φ
2 1 simprbi ⊢ x ∈ x ∈ A | φ → φ