Theorem rexrd

Description: A standard real is an extended real. (Contributed by Mario Carneiro, 28-May-2016)

	Ref	Expression
Hypothesis	rexrd.1	|- ( ph -> A e. RR )
Assertion	rexrd	|- ( ph -> A e. RR* )

Proof

Step	Hyp	Ref	Expression
1		rexrd.1	|- ( ph -> A e. RR )
2		ressxr	|- RR C_ RR*
3	2 1	sseldi	|- ( ph -> A e. RR* )