Metamath Proof Explorer


Theorem fpmd

Description: A total function is a partial function. (Contributed by Glauco Siliprandi, 5-Feb-2022)

Ref Expression
Hypotheses fpmd.a ⊢ φ → A ∈ V
fpmd.b ⊢ φ → B ∈ W
fpmd.c ⊢ φ → C ⊆ A
fpmd.f ⊢ φ → F : C ⟶ B
Assertion fpmd ⊢ φ → F ∈ B ↑ 𝑝𝑚 A

Proof

Step Hyp Ref Expression
1 fpmd.a ⊢ φ → A ∈ V
2 fpmd.b ⊢ φ → B ∈ W
3 fpmd.c ⊢ φ → C ⊆ A
4 fpmd.f ⊢ φ → F : C ⟶ B
5 elpm2r ⊢ B ∈ W ∧ A ∈ V ∧ F : C ⟶ B ∧ C ⊆ A → F ∈ B ↑ 𝑝𝑚 A
6 2 1 4 3 5 syl22anc ⊢ φ → F ∈ B ↑ 𝑝𝑚 A