Theorem neg1ne0

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

	Ref	Expression
Assertion	neg1ne0	$$⊢-1\ne 0$$

Proof

Step	Hyp	Ref	Expression
1		ax-1cn	$$⊢1\in ℂ$$
2		ax-1ne0	$$⊢1\ne 0$$
3	1 2	negne0i	$$⊢-1\ne 0$$