Theorem rexri

Description: A standard real is an extended real (inference form.) (Contributed by David Moews, 28-Feb-2017)

	Ref	Expression
Hypothesis	rexri.1	$$⊢A\in ℝ$$
Assertion	rexri	$$⊢A\in {ℝ}^{*}$$

Proof

Step	Hyp	Ref	Expression
1		rexri.1	$$⊢A\in ℝ$$
2		rexr	$$⊢A\in ℝ\to A\in {ℝ}^{*}$$
3	1 2	ax-mp	$$⊢A\in {ℝ}^{*}$$