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| Mirrors > Home > QLE Home > Th. List > lear | GIF version | ||
| Description: L.e. absorption. (Contributed by NM, 11-Nov-1997.) |
| Ref | Expression |
|---|---|
| lear | (a ∩ b) ≤ b |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ancom 74 | . 2 (a ∩ b) = (b ∩ a) | |
| 2 | lea 160 | . 2 (b ∩ a) ≤ b | |
| 3 | 1, 2 | bltr 138 | 1 (a ∩ b) ≤ b |
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