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| Mirrors > Home > MPE Home > Th. List > peano2nn0 | Structured version Visualization version Unicode version | ||
| Description: Second Peano postulate for nonnegative integers. (Contributed by NM, 9-May-2004.) |
| Ref | Expression |
|---|---|
| peano2nn0 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1nn0 11308 |
. 2
| |
| 2 | nn0addcl 11328 |
. 2
| |
| 3 | 1, 2 | mpan2 707 |
1
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