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Metamath Proof Explorer

Theorem nn0cni

Description: A nonnegative integer is a complex number. (Contributed by NM, 14-May-2003) Reduce dependencies on axioms. (Revised by Steven Nguyen, 8-Oct-2022)

		Ref	Expression
	Hypothesis	nn0rei.1	$⊢ A \in ℕ_{0}$
	Assertion	nn0cni	$⊢ A \in ℂ$

Proof

Step	Hyp	Ref	Expression
1		nn0rei.1	$⊢ A \in ℕ_{0}$
2		nn0sscn	$⊢ ℕ_{0} \subseteq ℂ$
3	2 1	sselii	$⊢ A \in ℂ$