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Mirrors > Home > NFE Home > Th. List > elcompl | Unicode version |
Description: Membership in complement. (Contributed by SF, 10-Jan-2015.) |
Ref | Expression |
---|---|
elbool.1 |
Ref | Expression |
---|---|
elcompl | ∼ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elbool.1 | . 2 | |
2 | elcomplg 3219 | . 2 ∼ | |
3 | 1, 2 | ax-mp 5 | 1 ∼ |
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