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Mirrors > Home > MPE Home > Th. List > df-oadd | Structured version Visualization version Unicode version |
Description: Define the ordinal addition operation. (Contributed by NM, 3-May-1995.) |
Ref | Expression |
---|---|
df-oadd |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | coa 7557 | . 2 | |
2 | vx | . . 3 | |
3 | vy | . . 3 | |
4 | con0 5723 | . . 3 | |
5 | 3 | cv 1482 | . . . 4 |
6 | vz | . . . . . 6 | |
7 | cvv 3200 | . . . . . 6 | |
8 | 6 | cv 1482 | . . . . . . 7 |
9 | 8 | csuc 5725 | . . . . . 6 |
10 | 6, 7, 9 | cmpt 4729 | . . . . 5 |
11 | 2 | cv 1482 | . . . . 5 |
12 | 10, 11 | crdg 7505 | . . . 4 |
13 | 5, 12 | cfv 5888 | . . 3 |
14 | 2, 3, 4, 4, 13 | cmpt2 6652 | . 2 |
15 | 1, 14 | wceq 1483 | 1 |
Colors of variables: wff setvar class |
This definition is referenced by: fnoa 7588 oav 7591 |
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