Theorem qcn

Description: A rational number is a complex number. (Contributed by NM, 2-Aug-2004)

	Ref	Expression
Assertion	qcn	$$⊢A\in \mathbb{Q}\to A\in ℂ$$

Proof

Step	Hyp	Ref	Expression
1		qsscn	$$⊢\mathbb{Q}\subseteq ℂ$$
2	1	sseli	$$⊢A\in \mathbb{Q}\to A\in ℂ$$