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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
 | 
| Copyright terms: Public domain | W3C validator |