Theorem 2pire

Description: ( 2 x. _pi ) is a real number. (Contributed by Umit Teoman Dogan, 10-Jun-2026)

	Ref	Expression
Assertion	2pire	⊢ ( 2 · π ) ∈ ℝ

Proof

Step	Hyp	Ref	Expression
1		2re	⊢ 2 ∈ ℝ
2		pire	⊢ π ∈ ℝ
3	1 2	remulcli	⊢ ( 2 · π ) ∈ ℝ