Theorem rehalfcld

Description: Real closure of half. (Contributed by Mario Carneiro, 27-May-2016)

	Ref	Expression
Hypothesis	rehalfcld.1	|- ( ph -> A e. RR )
Assertion	rehalfcld	|- ( ph -> ( A / 2 ) e. RR )

Proof

Step	Hyp	Ref	Expression
1		rehalfcld.1	|- ( ph -> A e. RR )
2		rehalfcl	|- ( A e. RR -> ( A / 2 ) e. RR )
3	1 2	syl	|- ( ph -> ( A / 2 ) e. RR )