Description: A positive real is greater than zero. (Contributed by Mario Carneiro, 28May2016)
Ref  Expression  

Hypothesis  rpred.1   ( ph > A e. RR+ ) 

Assertion  rpgt0d   ( ph > 0 < A ) 
Step  Hyp  Ref  Expression 

1  rpred.1   ( ph > A e. RR+ ) 

2  rpgt0   ( A e. RR+ > 0 < A ) 

3  1 2  syl   ( ph > 0 < A ) 