Metamath Proof Explorer


Theorem elmaprd

Description: Deduction associated with elmapd . Reverse direction of elmapdd . (Contributed by Thierry Arnoux, 13-Oct-2025) Removed redundant hypotheses. (Revised by SN, 30-Aug-2026)

Ref Expression
Hypothesis elmaprd.1 ⊢ φ → F ∈ B A
Assertion elmaprd ⊢ φ → F : A ⟶ B

Proof

Step Hyp Ref Expression
1 elmaprd.1 ⊢ φ → F ∈ B A
2 elmapi ⊢ F ∈ B A → F : A ⟶ B
3 1 2 syl ⊢ φ → F : A ⟶ B