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Mirrors > Home > MPE Home > Th. List > elsni | Structured version Unicode version |
Description: There is only one element in a singleton. (Contributed by NM, 5-Jun-1994.) |
Ref | Expression |
---|---|
elsni |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elsncg 4007 |
. 2
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2 | 1 | ibi 241 |
1
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