Theorem nncn

Description: A positive integer is a complex number. (Contributed by NM, 18-Aug-1999)

	Ref	Expression
Assertion	nncn	$$⊢A\in \mathbb{N}\to A\in ℂ$$

Proof

Step	Hyp	Ref	Expression
1		nnsscn	$$⊢\mathbb{N}\subseteq ℂ$$
2	1	sseli	$$⊢A\in \mathbb{N}\to A\in ℂ$$