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Metamath Proof Explorer

Theorem negicn

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

		Ref	Expression
	Assertion	negicn	⊢ - i ∈ ℂ

Step	Hyp	Ref	Expression
1		ax-icn	⊢ i ∈ ℂ
2		negcl	⊢ ( i ∈ ℂ → - i ∈ ℂ )
3	1 2	ax-mp	⊢ - i ∈ ℂ