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| Mirrors > Home > QLE Home > Th. List > leo | GIF version | ||
| Description: L.e. absorption. (Contributed by NM, 27-Aug-1997.) |
| Ref | Expression |
|---|---|
| leo | a ≤ (a ∪ b) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | anabs 121 | . 2 (a ∩ (a ∪ b)) = a | |
| 2 | 1 | df2le1 135 | 1 a ≤ (a ∪ b) |
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