Theorem nnn0

Description: The set of positive integers is nonempty. (Contributed by Glauco Siliprandi, 8-Apr-2021)

	Ref	Expression
Assertion	nnn0	$$⊢\mathbb{N}\ne \varnothing$$

Proof

Step	Hyp	Ref	Expression
1		1nn	$$⊢1\in \mathbb{N}$$
2	1	ne0ii	$$⊢\mathbb{N}\ne \varnothing$$