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| Mirrors > Home > ILE Home > Th. List > nnuz | Unicode version | ||
| Description: Positive integers expressed as an upper set of integers. (Contributed by NM, 2-Sep-2005.) | 
| Ref | Expression | 
|---|---|
| nnuz | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | nnzrab 9350 | 
. 2
 | |
| 2 | 1z 9352 | 
. . 3
 | |
| 3 | uzval 9603 | 
. . 3
 | |
| 4 | 2, 3 | ax-mp 5 | 
. 2
 | 
| 5 | 1, 4 | eqtr4i 2220 | 
1
 | 
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