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Metamath Proof Explorer

Theorem pirp

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

		Ref	Expression
	Assertion	pirp	⊢ π ∈ ℝ⁺

Step	Hyp	Ref	Expression
1		pire	⊢ π ∈ ℝ
2		pipos	⊢ 0 < π
3	1 2	elrpii	⊢ π ∈ ℝ⁺