Theorem nnxr

Description: A natural number is an extended real. (Contributed by Glauco Siliprandi, 24-Jan-2025)

	Ref	Expression
Assertion	nnxr	$$⊢N\in \mathbb{N}\to N\in {ℝ}^{*}$$

Proof

Step	Hyp	Ref	Expression
1		id	$$⊢N\in \mathbb{N}\to N\in \mathbb{N}$$
2	1	nnxrd	$$⊢N\in \mathbb{N}\to N\in {ℝ}^{*}$$