Theorem zssq

Description: The integers are a subset of the rationals. (Contributed by NM, 9-Jan-2002)

	Ref	Expression
Assertion	zssq	$$⊢\mathbb{Z}\subseteq \mathbb{Q}$$

Proof

Step	Hyp	Ref	Expression
1		zq	$$⊢x\in \mathbb{Z}\to x\in \mathbb{Q}$$
2	1	ssriv	$$⊢\mathbb{Z}\subseteq \mathbb{Q}$$