Theorem zssxr

Description: The integers are a subset of the extended reals. (Contributed by Glauco Siliprandi, 23-Oct-2021)

	Ref	Expression
Assertion	zssxr	$$⊢\mathbb{Z}\subseteq {ℝ}^{*}$$

Proof

Step	Hyp	Ref	Expression
1		zssre	$$⊢\mathbb{Z}\subseteq ℝ$$
2		ressxr	$$⊢ℝ\subseteq {ℝ}^{*}$$
3	1 2	sstri	$$⊢\mathbb{Z}\subseteq {ℝ}^{*}$$