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Related theorems Unicode version |
| Description: Transitive inference useful for introducing definitions. |
| Ref | Expression |
|---|---|
| 3tr1.1 |
|
| 3tr1.2 |
|
| 3tr1.3 |
|
| Ref | Expression |
|---|---|
| 3tr1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3tr1.2 |
. 2
| |
| 2 | 3tr1.1 |
. . 3
| |
| 3 | 3tr1.3 |
. . . 4
| |
| 4 | 3 | ax-r1 34 |
. . 3
|
| 5 | 2, 4 | ax-r2 35 |
. 2
|
| 6 | 1, 5 | ax-r2 35 |
1
|