Metamath Proof Explorer

Theorem frel

Description: A mapping is a relation. (Contributed by NM, 3-Aug-1994)

		Ref	Expression
	Assertion	frel	$⊢ F : A ⟶ B \to Rel F$

Proof

Step	Hyp	Ref	Expression
1		ffn	$⊢ F : A ⟶ B \to F Fn A$
2		fnrel	$⊢ F Fn A \to Rel F$
3	1 2	syl	$⊢ F : A ⟶ B \to Rel F$