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Mirrors > Home > MPE Home > Th. List > eldifsn | Structured version Visualization version Unicode version |
Description: Membership in a set with an element removed. (Contributed by NM, 10-Oct-2007.) |
Ref | Expression |
---|---|
eldifsn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldif 3584 | . 2 | |
2 | elsng 4191 | . . . 4 | |
3 | 2 | necon3bbid 2831 | . . 3 |
4 | 3 | pm5.32i 669 | . 2 |
5 | 1, 4 | bitri 264 | 1 |
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