Database
SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for Richard Penner
Surreal Contributions
3fno
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4fno
Metamath Proof Explorer
Ascii
Structured
Theorem
3fno
Description:
Ordinal three maps to a surreal number.
(Contributed by
RP
, 21-Sep-2023)
Ref
Expression
Assertion
3fno
⊢
( 3
o
× { 2
o
} ) ∈
No
Proof
Step
Hyp
Ref
Expression
1
3on
⊢
3
o
∈ On
2
1
onnoxpi
⊢
( 3
o
× { 2
o
} ) ∈
No