Theorem 2sno

Description: Surreal two is a surreal number. (Contributed by Scott Fenton, 23-Jul-2025)

	Ref	Expression
Assertion	2sno	⊢ 2s ∈ No

Proof

Step	Hyp	Ref	Expression
1		2nns	⊢ 2s ∈ ℕs
2		nnsno	⊢ ( 2s ∈ ℕs → 2s ∈ No )
3	1 2	ax-mp	⊢ 2s ∈ No