Metamath Proof Explorer


Theorem 3fno

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

Ref Expression
Assertion 3fno ( 3o × { 2o } ) ∈ No

Proof

Step Hyp Ref Expression
1 3on 3o ∈ On
2 1 onnoxpi ( 3o × { 2o } ) ∈ No