Theorem nncni

Description: A positive integer is a complex number. (Contributed by NM, 18-Aug-1999) Reduce dependencies on axioms. (Revised by Steven Nguyen, 4-Oct-2022)

	Ref	Expression
Hypothesis	nnre.1	$$⊢A\in \mathbb{N}$$
Assertion	nncni	$$⊢A\in ℂ$$

Proof

Step	Hyp	Ref	Expression
1		nnre.1	$$⊢A\in \mathbb{N}$$
2		nncn	$$⊢A\in \mathbb{N}\to A\in ℂ$$
3	1 2	ax-mp	$$⊢A\in ℂ$$