Theorem 1no

Description: Ordinal one maps to a surreal number. (Contributed by RP, 21-Sep-2023)

	Ref	Expression
Assertion	1no	$$⊢1_{𝑜}\times \left\{2_{𝑜}\right\}\in \mathrm{No}$$

Proof

Step	Hyp	Ref	Expression
1		1on	$$⊢1_{𝑜}\in \mathrm{On}$$
2	1	onnoi	$$⊢1_{𝑜}\times \left\{2_{𝑜}\right\}\in \mathrm{No}$$