Theorem onsno

Description: A surreal ordinal is a surreal. (Contributed by Scott Fenton, 18-Mar-2025)

	Ref	Expression
Assertion	onsno	⊢ ( 𝐴 ∈ Ons → 𝐴 ∈ No )

Proof

Step	Hyp	Ref	Expression
1		onssno	⊢ Ons ⊆ No
2	1	sseli	⊢ ( 𝐴 ∈ Ons → 𝐴 ∈ No )