Theorem fndmi

Description: The domain of a function. (Contributed by Wolf Lammen, 1-Jun-2024)

	Ref	Expression
Hypothesis	fndmi.1	$$⊢FFnA$$
Assertion	fndmi	$$⊢\mathrm{dom}F=A$$

Proof

Step	Hyp	Ref	Expression
1		fndmi.1	$$⊢FFnA$$
2		fndm	$$⊢FFnA\to \mathrm{dom}F=A$$
3	1 2	ax-mp	$$⊢\mathrm{dom}F=A$$