Theorem neg1ne0

Description: -1 is nonzero. (Contributed by David A. Wheeler, 8-Dec-2018)

	Ref	Expression
Assertion	neg1ne0	⊢ - 1 ≠ 0

Proof

Step	Hyp	Ref	Expression
1		ax-1cn	⊢ 1 ∈ ℂ
2		ax-1ne0	⊢ 1 ≠ 0
3	1 2	negne0i	⊢ - 1 ≠ 0