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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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