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Mirrors > Home > MPE Home > Th. List > nnzd | Structured version Visualization version Unicode version |
Description: A nonnegative integer is an integer. (Contributed by Mario Carneiro, 28-May-2016.) |
Ref | Expression |
---|---|
nnzd.1 |
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Ref | Expression |
---|---|
nnzd |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnzd.1 |
. . 3
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2 | 1 | nnnn0d 10959 |
. 2
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3 | 2 | nn0zd 11072 |
1
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