Theorem zsscn

Description: The integers are a subset of the complex numbers. (Contributed by NM, 2-Aug-2004)

	Ref	Expression
Assertion	zsscn	⊢ ℤ ⊆ ℂ

Proof

Step	Hyp	Ref	Expression
1		zcn	⊢ ( 𝑥 ∈ ℤ → 𝑥 ∈ ℂ )
2	1	ssriv	⊢ ℤ ⊆ ℂ