Theorem zxrd

Description: An integer is an extended real number. (Contributed by Glauco Siliprandi, 2-Jan-2022)

	Ref	Expression
Hypothesis	zxrd.1	$$⊢\phi \to A\in \mathbb{Z}$$
Assertion	zxrd	$$⊢\phi \to A\in {ℝ}^{*}$$

Proof

Step	Hyp	Ref	Expression
1		zxrd.1	$$⊢\phi \to A\in \mathbb{Z}$$
2	1	zred	$$⊢\phi \to A\in ℝ$$
3	2	rexrd	$$⊢\phi \to A\in {ℝ}^{*}$$