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 ∈ ℕ
Assertion	nncni	⊢ 𝐴 ∈ ℂ

Proof

Step	Hyp	Ref	Expression
1		nnre.1	⊢ 𝐴 ∈ ℕ
2		nncn	⊢ ( 𝐴 ∈ ℕ → 𝐴 ∈ ℂ )
3	1 2	ax-mp	⊢ 𝐴 ∈ ℂ