This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.

Metamath Proof Explorer

Theorem zcn

Description: An integer is a complex number. (Contributed by NM, 9-May-2004)

		Ref	Expression
	Assertion	zcn	$⊢ N \in ℤ \to N \in ℂ$

Step	Hyp	Ref	Expression
1		zre	$⊢ N \in ℤ \to N \in ℝ$
2	1	recnd	$⊢ N \in ℤ \to N \in ℂ$