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| Mirrors > Home > ILE Home > Th. List > nngt0d | Unicode version | ||
| Description: A positive integer is positive. (Contributed by Mario Carneiro, 27-May-2016.) | 
| Ref | Expression | 
|---|---|
| nnge1d.1 | 
 | 
| Ref | Expression | 
|---|---|
| nngt0d | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | nnge1d.1 | 
. 2
 | |
| 2 | nngt0 9015 | 
. 2
 | |
| 3 | 1, 2 | syl 14 | 
1
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