This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.

Metamath Proof Explorer

Theorem 9ne0

Description: The number 9 is nonzero. (Contributed by SN, 22-Oct-2025)

		Ref	Expression
	Assertion	9ne0	$⊢ 9 \neq 0$

Step	Hyp	Ref	Expression
1		9nn	$⊢ 9 \in ℕ$
2	1	nnne0i	$⊢ 9 \neq 0$