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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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