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| Mirrors > Home > ILE Home > Th. List > df-ne | Unicode version | ||
| Description: Define inequality. (Contributed by NM, 5-Aug-1993.) | 
| Ref | Expression | 
|---|---|
| df-ne | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | cA | 
. . 3
 | |
| 2 | cB | 
. . 3
 | |
| 3 | 1, 2 | wne 2367 | 
. 2
 | 
| 4 | 1, 2 | wceq 1364 | 
. . 3
 | 
| 5 | 4 | wn 3 | 
. 2
 | 
| 6 | 3, 5 | wb 105 | 
1
 | 
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