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Mirrors > Home > MPE Home > Th. List > peano2nnd | Structured version Visualization version Unicode version |
Description: Peano postulate: a successor of a positive integer is a positive integer. (Contributed by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
---|---|
nnred.1 |
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Ref | Expression |
---|---|
peano2nnd |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnred.1 |
. 2
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2 | peano2nn 11032 |
. 2
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3 | 1, 2 | syl 17 |
1
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