Theorem negicn

Description: -u _i is a complex number. (Contributed by David A. Wheeler, 7-Dec-2018)

	Ref	Expression
Assertion	negicn	$$⊢-\mathrm{i}\in ℂ$$

Proof

Step	Hyp	Ref	Expression
1		ax-icn	$$⊢\mathrm{i}\in ℂ$$
2		negcl	$$⊢\mathrm{i}\in ℂ\to -\mathrm{i}\in ℂ$$
3	1 2	ax-mp	$$⊢-\mathrm{i}\in ℂ$$