Theorem pirp

Description: _pi is a positive real. (Contributed by Glauco Siliprandi, 11-Dec-2019)

	Ref	Expression
Assertion	pirp	|- _pi e. RR+

Proof

Step	Hyp	Ref	Expression
1		pire	|- _pi e. RR
2		pipos	|- 0 < _pi
3	1 2	elrpii	|- _pi e. RR+