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| Mirrors > Home > ILE Home > Th. List > bitr4d | Unicode version | ||
| Description: Deduction form of bitr4i 187. (Contributed by NM, 5-Aug-1993.) |
| Ref | Expression |
|---|---|
| bitr4d.1 |
|
| bitr4d.2 |
|
| Ref | Expression |
|---|---|
| bitr4d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bitr4d.1 |
. 2
| |
| 2 | bitr4d.2 |
. . 3
| |
| 3 | 2 | bicomd 141 |
. 2
|
| 4 | 1, 3 | bitrd 188 |
1
|
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