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Related theorems Unicode version |
| Description: Disjunction of 2 l.e.'s |
| Ref | Expression |
|---|---|
| lel2.1 |
|
| lel2.2 |
|
| Ref | Expression |
|---|---|
| lel2or |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lel2.1 |
. . 3
| |
| 2 | lel2.2 |
. . 3
| |
| 3 | 1, 2 | le2or 168 |
. 2
|
| 4 | oridm 110 |
. 2
| |
| 5 | 3, 4 | lbtr 139 |
1
|