Theorem negpicn

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

	Ref	Expression
Assertion	negpicn	$$⊢-\mathrm{\pi }\in ℂ$$

Proof

Step	Hyp	Ref	Expression
1		picn	$$⊢\mathrm{\pi }\in ℂ$$
2	1	negcli	$$⊢-\mathrm{\pi }\in ℂ$$