| Quantum Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > QLE Home > Th. List > lel2or | GIF version | ||
| Description: Disjunction of 2 l.e.'s. (Contributed by NM, 11-Nov-1997.) |
| Ref | Expression |
|---|---|
| lel2.1 | a ≤ b |
| lel2.2 | c ≤ b |
| Ref | Expression |
|---|---|
| lel2or | (a ∪ c) ≤ b |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lel2.1 | . . 3 a ≤ b | |
| 2 | lel2.2 | . . 3 c ≤ b | |
| 3 | 1, 2 | le2or 168 | . 2 (a ∪ c) ≤ (b ∪ b) |
| 4 | oridm 110 | . 2 (b ∪ b) = b | |
| 5 | 3, 4 | lbtr 139 | 1 (a ∪ c) ≤ b |
| Copyright terms: Public domain | W3C validator |