Theorem neneq

Description: From inequality to non-equality. (Contributed by Glauco Siliprandi, 11-Dec-2019)

	Ref	Expression
Assertion	neneq	$$⊢A\ne B\to \neg A=B$$

Proof

Step	Hyp	Ref	Expression
1		id	$$⊢A\ne B\to A\ne B$$
2	1	neneqd	$$⊢A\ne B\to \neg A=B$$