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Related theorems Unicode version |
| Description: Transitive inference. |
| Ref | Expression |
|---|---|
| lbtr.1 |
|
| lbtr.2 |
|
| Ref | Expression |
|---|---|
| lbtr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lbtr.2 |
. . . . 5
| |
| 2 | 1 | ax-r1 34 |
. . . 4
|
| 3 | 2 | lan 70 |
. . 3
|
| 4 | lbtr.1 |
. . . 4
| |
| 5 | 4 | df2le2 128 |
. . 3
|
| 6 | 3, 5 | ax-r2 35 |
. 2
|
| 7 | 6 | df2le1 127 |
1
|