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Mirrors > Home > MPE Home > Th. List > 2nn0 | Structured version Visualization version Unicode version |
Description: 2 is a nonnegative integer. (Contributed by Raph Levien, 10-Dec-2002.) |
Ref | Expression |
---|---|
2nn0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2nn 11185 | . 2 | |
2 | 1 | nnnn0i 11300 | 1 |
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