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Metamath Proof Explorer

Theorem zssxr

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

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

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