Metamath Proof Explorer

Definition df-8o

Description: Define the ordinal number 8. (Contributed by BTernaryTau, 2-Sep-2026)

Ref Expression
Assertion df-8o 
|- 8o = suc 7o

Detailed syntax breakdown

Step Hyp Ref Expression
0 c8o 
 |-  8o
1 c7o 
 |-  7o
2 1 csuc 
 |-  suc 7o
3 0 2 wceq 
 |-  8o = suc 7o