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 e. NN
Assertion	nncni	|- A e. CC

Proof

Step	Hyp	Ref	Expression
1		nnre.1	|- A e. NN
2		nncn	|- ( A e. NN -> A e. CC )
3	1 2	ax-mp	|- A e. CC