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| Mirrors > Home > MPE Home > Th. List > ne0i | Structured version Visualization version Unicode version | ||
| Description: If a set has elements, then it is not empty. (Contributed by NM, 31-Dec-1993.) |
| Ref | Expression |
|---|---|
| ne0i |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | n0i 3920 |
. 2
| |
| 2 | 1 | neqned 2801 |
1
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