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| Mirrors > Home > MPE Home > Th. List > nncnd | Structured version Visualization version Unicode version | ||
| Description: A positive integer is a complex number. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| nnred.1 |
|
| Ref | Expression |
|---|---|
| nncnd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnsscn 11025 |
. 2
| |
| 2 | nnred.1 |
. 2
| |
| 3 | 1, 2 | sseldi 3601 |
1
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