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Mirrors > Home > MPE Home > Th. List > nnzi | Structured version Visualization version Unicode version |
Description: A positive integer is an integer. (Contributed by Mario Carneiro, 18-Feb-2014.) |
Ref | Expression |
---|---|
nnzi.1 |
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Ref | Expression |
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nnzi |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnssz 10964 |
. 2
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2 | nnzi.1 |
. 2
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3 | 1, 2 | sselii 3431 |
1
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