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Metamath Proof Explorer

Theorem negpicn

Description: -u _pi is a real number. (Contributed by David A. Wheeler, 8-Dec-2018)

		Ref	Expression
	Assertion	negpicn	$⊢ - π \in ℂ$

Step	Hyp	Ref	Expression
1		picn	$⊢ π \in ℂ$
2	1	negcli	$⊢ - π \in ℂ$