Metamath Proof Explorer
Definition df-1o
Description: Define the ordinal number 1. Definition 2.1 of Schloeder p. 4.
(Contributed by NM, 29-Oct-1995)
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|
Ref |
Expression |
|
Assertion |
df-1o |
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Detailed syntax breakdown
Step |
Hyp |
Ref |
Expression |
0 |
|
c1o |
|
1 |
|
c0 |
|
2 |
1
|
csuc |
|
3 |
0 2
|
wceq |
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